What’s new?
v97 (November 2026)
- New pages: help by topic with clickable examples, all features, about us and contact
- New menu and language picker, designed for mobile and dark mode
- Fixed the reading of
(2/3)x+8=40, which now gives x = 48
- Fixed the solving of
x(x^2+1) != 0
- Inverse of factored polynomials and better simplified derivatives
v96
- Functions of complex numbers: sine, cosine, exponential, logarithm.
- More integrals and factorizations, such as sums of cubes.
- Better-explained asymptotes, with holes marked on graphs.
v95
- Automatic dark theme.
- Redesigned display for mobile.
v94
- EMA speaks Portuguese.
- Even more sentences understood, such as "limit from the right".
v93
- EMA speaks Spanish.
- Explanations reviewed and more natural in every language.
v92
- Higher-order derivatives and integrals in words:
third derivative of x^5.
- Partial derivatives with their usual notations:
∂/∂x(x^2y).
- Area between two curves and slope of a line through two points.
- Fixed solving
|(x+5)/(x-3)| > 1.
v91
- Full study of a function typed on its own:
y=x^2-6x+8.
- New differential equations solved.
- Check that a point lies on a curve:
(1, 3) on y = x^2 + 2.
- Fixed solving
-3(x+1)^2+12 < 0.
v90
- Several curves on the same graph:
plot x^2 and x^3 from -5 to 5.
- The function study draws the table of variations.
- Fixed solving
(x^2 - y)(x - 1) = 0.
v89
- New differential equations solved.
- Limits and absolute-value inequalities better explained.
v88
- New: full function study,
study f(x)=x^2-3x.
- Sign of each factor explained before the sign table.
- Fixed
limit of (x^2+1)/(x-1) at +inf.
v87
- Every answer has its detailed explanations, one click away.
- "No solution" answers are justified.
- Fixed the steps of
9 - (-3) - 6.
v86
- Equations with parameters, along with their conditions.
- New integrals by substitution.
- cot, sec and csc functions recognized.
- Fixed
limit of sin(sin(x))/x at +inf.
v85
- More common questions supported.
- Fewer needless warnings.
- Fixed
limit of x^(20x) at +inf.
v84
- Solving on an interval:
solve sin(x)=0 on [0,2*pi].
- More reliable results after a full review of the engine.
- Fixed computing
asin(-1).
v83
- More reliable results: logarithms, sign tables, complex numbers.
v82
- Improved Laplace transforms.
v81
- Warnings fold away to keep answers light.
v80
- Range and inverse function better presented.
- Factoring over ℂ offered.
v79
- Quick inputs read more reliably, such as
ax2+bx.
v78
- Absolute values explained case by case.
v77
- Period of trigonometric functions explained in more detail.
v76
- Shorter steps for linear equations.
v75
- Local extrema justified by the second derivative.
- Telescoping series explained in detail.
v74
- Powers with the same base grouped before computing.
v73
- Factoring by grouping explained.
v72
- Offer to solve over ℂ when useful.
- Tangent to a curve.
v71
- d/dx and ∂/∂x notations understood.
- Inflection points.
v70
- New: curve plotting,
plot x^2 between -2 and 2.
v69
- More common questions supported.
v68
- Asymptotes of rational functions.
v67
- Midpoint of two points named from A to Z.
v66
- New: midpoint of two points and period of trigonometric functions.
v65
- New "More explanations" button.
v64
- Exponential equations solved with a common base.
- New "Lost?" page.
v63
- New: give your feedback on each answer.
- Mixed numbers explained in detail.
v62
- Integrals with an infinite bound.
- GCD and LCM explained step by step.
- Fixed
derivative of x/3.
v61
- New: repeated percentage problems, such as a population growing by 5% a year.
- Percentages and fractions in words:
25% of 200, "two thirds of 12".
v60
- Exponential equations solved better.
- Fixed solving
c! = c^3 - c.
v59
- Ask for a specific decimal:
the 67th decimal of sqrt(7).
- Up to 100 decimals.
v58
- Choose the number of decimals:
pi with 20 decimals.
- Scientific notation on request.
v57
- Trigonometric angles reduced and explained.
v56
- Sine and cosine explained with the unit circle.
v55
- Large numbers written with thousands separators.
- Definitions and help requested in plain sentences.
v54
- New: a copied exercise is solved question by question.
- New: check an equality,
verify that 2^10 = 1024.
- Fixed
division of x^2+x^5 by x^15.
v53
- Ask why:
why (-5)^2.
- Fixed computing
-1/2*-4.
v52
- New: explanations quote the rules from class.
v51
- Logarithms in any base:
log2(8).
- Functions in words: "natural log of x".
- Fixed solving
cos(x) = 2.
v50
- New: direct and inverse variation problems.
- Examples suggested when a question is not understood.
- Fixed computing
2+3 to the power of 3.
v49
- New: "is it equal?",
is -x^4 equal to x^4?.
- Solve for a chosen variable.
- Fixed solving
-x^4=x^4.
v48
- Several derivatives or integrals in one sentence.
v47
- Combine commands:
multiply the derivative of x^2 by 3.
- Exponential form with Euler's formula.
v46
- Inputs without parentheses understood:
sin x.
- Fixed
integrate x^2/(x+1)^2.
v45
- Powers in words:
3 cubed.
- One request per line; several equations make a system.
- Fixed computing
tan(1.57079633).
v44
- New background and new colors.
- Operations in words: "subtract 4 from negative 8".
v43
- GCD, LCM and average.
- Simplification of polynomial fractions.
v41
- Sentences better understood.
v40
- New natural-language understanding engine.
v39
- More reliable sequences and integrals.
v38
- New: domain of definition,
domain(ln(x)).
- Double inequalities.
v36
- Limits and sums in natural language.
- L'Hôpital's rule and Taylor expansions.
v35
- More powerful equation solving.
v34
- Complex numbers: argument, exponential form, roots.
- Solve over ℝ or ℂ, your choice.
v32
- Quadratic equations solved better.
v31
- Sign tables for inequalities.
v30
- First public release: calculations, derivatives, integrals and equations, step by step.
