I have some Questions, that i need help with, explaining how to do them for myself would be a huge help.

How would i simplify this equation?

‑3 x a x b - 5 x a x ‑b

I have to find the value of this expression: 2x2 - 3y + 5 when x = 2 and y = ‑3

Simplify 5a 2 - 4ab 2 - 2a 2 + 6ab 2

Expand and then simplify:

a. 4(3 + 2x - y) - 2(5 - x + 3y)

b. a(3b + x) + b(2a - y)