NapkinCalc

Start Here — A Complete Tour

Show the work — the Steps button

continues from lesson 11 — values defined earlier in the course stay live here

NapkinCalc can explain how it reached an answer, not just give it. When a cell does something it can teach — a derivative, an integral, a factorisation, or a numeric goal-seek — a small Steps button appears next to the result. Click it to watch the worked solution unfold line by line, with a slider to step through each move. (Steps is a Pro feature — look for the button beside the results below.)

derivdemo=diff(x3+2⋅x,x)deriv_{demo} = \mathrm{diff}\left(x^{3} + 2 \cdot x, x\right) = 3⋅x2+23 \cdot x^{2}+2 a derivative — click “Steps” by the result to see each rule applied
integdemo=integrate(2⋅x,x)integ_{demo} = \mathrm{integrate}\left(2 \cdot x, x\right) = x2x^{2} an integral — “Steps” walks through the antiderivative

Look for the small Steps button beside the two results above — that's the explainer. The same button shows up on factor, expand, and simplify cells, and on the numeric nsolve goal-seek, throughout the courses ahead. It turns NapkinCalc from a calculator into a tutor that shows its work.