Smart Math Calculator 1.5

Publisher's description of Smart Math Calculator

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From Runiter:

Easy-to-use math calculator that immediately computes the result as you type a math expression. It allows to calculate multiple math expressions at the same time. It also allows defining your own variables and functions that can be set to a value or other math expressions. It has a beautiful user-interface that conveniently allows you to directly edit the expression or if you prefer use the visual key pad to enter new expressions. There is support for over 20 math functions.

Version 1.5 adds support for defining custom functions that call themselves (recursive functions) and support for true/false expressions.

Calculus Problem Solver 1

Publisher's description of Calculus Problem Solver

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From Runiter:

Calculus Problem Solver can solve differentiation of any arbitrary equation and output the result. It can provide detailed step-by-step solutions to given differentiation problems in a tutorial-like format. In addition to these, it can also initiate an interactive quiz in which you can solve differentiation while the computer corrects your solutions.