I got an assignment in which I need to create a physics calculator to solve the 'Motion' formulas, this is an screenshot of the formulas I need:
Motion formulas

The problem that I'm having is that I'm literally lost in how to implement them. I have found lots of tutorials but all of them want to solve for everything, I mean all of the letter of each equation and that's not what I want.

I currently have this but I feel like I'm complicating my life with a lot of fuctions for something that is supposed to be simple. Right now I'm basing myself from a tutorial in which the guy is solving for any letter.
https://repl.it/@KevinAzuara/PhysicsCalculatorKevinAzuaraFonseca

Thanks...