Type an expression and Pencilbox works out its derivative, integral or limit — symbolically, and rendered as clean math. Use ^ for powers, * for multiply, and names like sin, cos, tan, ln, sqrt, e and pi. Everything is computed in your browser; nothing is uploaded.

Expression Variable

Order Evaluate at (optional)

Your result appears here.

Try:

Results are computed symbolically with a self-hosted computer-algebra engine (nerdamer) and typeset with KaTeX — both run on your device. Indefinite integrals omit the constant of integration; it is shown as “+ C”. Natural log is written ln. One-sided limits are evaluated numerically. Some hard integrals or limits may not have a closed form the engine can find — try rephrasing, or use a definite integral for a numeric value. Nothing you type is uploaded.