Pros:

AWESOME !!

why this app is not yet present when i was still in school :(

an app that works like a QR reader. Through the app, you can point your phone camera to a math problem and get the answer within seconds and be able to answer math problems like trigonometry, arithmetic, root, logarithm, linear equations and inequalities, equation systems, derivatives and integrals.

This is an easy way to solve a difficult math problem :)

Cons:

What if we are lazy to think and make dependence on this application for math affairs. is not this one big problem.