Calculator + is a handy android tool which calculates kinds of mathematical problems
you can solve trigonometric and calculus problems as well as complex math equations by camera.

Main Features:
Beautiful Interface: Simple and easy-to-use interface.
Basic Calculator: User-friendly basic mathematics.
Photo Math: Solve the mathematical problems by taking pictures of them.
Solve complex problems: Solve multiple problems at the same time.
Answer Checking: Photo to check out the wrong answers. 
Mufti-functional Calculator: All-in-one mufti-functional scientific calculator.
Equation Calculator: Solve the complex math homework easily.
Unit Conversion: Units Conversion for different bases.