Mathway - Android APK

https://play.google.com/store/apps/details?id=com.bagatrix.mathway.android&hl=en

With millions of users and billions of problems solved, Mathway is the world's smartest math calculator. From basic algebra to complex calculus, Mathway instantly solves your most difficult math problems - simply type your problem in (or point your camera and snap a pic!) to receive instant free answers. Need detailed step-by-step solutions? Mathway is like a private tutor in the palm of your hand, providing instant homework help anywhere, anytime.

Photomath - Android APK

https://play.google.com/store/apps/details?id=com.microblink.photomath&hl=en

Photomath is the #1 app to learn math, to take the frustration out of math and to bring more peace to your daily student life. Instantly scan printed text AND handwritten math problems using your device’s camera or type and edit equations with our scientific calculator. Photomath breaks down every math problem into simple, easy-to-understand steps so you can really understand core concepts and can answer things confidently.