i need ro know more about how to do this. can you help me out?

1) Since we need to simplify this polynomial expression, we need to do it step by step:
[tex]\begin{gathered} (-7w^2-2w-1)-(-5w^2+3w-2)\:Remove\:the\:Parentheses \\ -7w^2-2w-1-\left(-5w^2+3w-2\right) \\ -7w^2-2w-1+5w^2-3w+2\:Combine\:like\:terms,and\:numbers \\ -2w^2-5w+1 \\ \end{gathered}[/tex]2) Thus the answer is -2w²-5w+1