Direct substitution calculator

It even shows each step to help me teach her. It has really helped me understand math problems. Whoever made this app is the smartest person in the world. I have yet to see a wrong answer. They recently introduced a subscription, but it isn't restricting anything, at the same time too it helps me to understand the problem, thank you again.

It is really helpful with helping me study. Some times it works perfectly but sometimes a tiny mistake in the typing process can lead to getting a problem wrong.

You will pass with this app though, covers basic maths such as BIDMAS through to differentiation, functions, imaginary numbers etc. Great use and super helpful. Usually the app doesn't know what your talking about but this one does it gives you options and it helps alot.