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Wolfram Alpha is a "Computational Knowledge Engine" - different from a search engine, it answers factual queries directly by computing the answer from structured data, rather than providing a list of documents or web pages that might contain the answer.

PhotoMath is the world's first camera calculator. Just point the camera towards the mathematical expression, and PhotoMath instantly displays a correct result.

Online math solver, equation library, graphing calculator and science/engineering problem helper.Calculate multiple equations at once, Edit existing formulas and Create new ones, Compute large numbers of values, Plot graphs, Link your results, Solve full problems and Share worksheets with your friends.

Enter your math problem, and let Cymath solve it for you step-by-step!

Mathway provides students with the tools they need to solve their math problems. With tens of millions of problems already solved, Mathway is the #1 online problem solving resource available for students, parents, and teachers.

Math, part of the Apache OpenOffice suite, is a tool for creating and editing mathematical equations, similar to Microsoft Equation Editor (included in Microsoft Office). The created equations can then be embedded inside other OpenOffice.org documents, such as those created by Writer. Math supports multiple fonts and can export to PDF.

Symbolab: equation search and math solver - solves algebra, trigonometry and calculus problems step by step

SymPy Gamma is a simple web application based on Google App Engine that executes and displays the results of SymPy expressions as well as additional related computations, in a fashion similar to that of Wolfram Alpha. For instance, entering an integer will display prime factors, digits in the base-10 expansion, and a factorization diagram. Entering a function will give its docstring; in general, entering an arbitrary expression will provide the derivative, integral, series expansion, plot, and roots. »

Mathpix is the first app that lets you solve math by taking pictures of your handwriting. Simply snap a picture and get accurate plots and solutions.