Question

Subtract.
(5y^3 – 2y^2 –1) – (y^2 – 2y – 3)

Answer 1

Distribute the -:
\[5y^3-2y^2-1-y^2-(-2y)-(-3)=5y^3-2y^2-1-y^2+2y+3\]
You take it from there :P

Answer 2

what step is after that?

Answer 3

Combine like terms:
For example, 17x^3-14x^3=3x^3.
What would you get?