Symbolab – Math solver v2.11 [Subscribed]
Requirements: Android 3.0 and up
Overview: Your private math tutor, solves any math problem with steps!

History! Every problem you solved is saved in history and you can get back to it anytime you want.

Symbolab calculator... http://www.apkformod.com/symbolab-math-solver-v2-11-subscribed/