Express the following heaviside function in piecewise

Question

Express the following Heaviside function in Piecewise function form!

h (x) = xH (x + 4) + (x² - x) H(x) + (7 + x²) H(x - 5)

Here was my attempt at the question:

h (x) = {x, x < -4

{x2 - x, -4 ≤ X ≤ 5

{7 + x², x ≥ 5

When you give your answer, If you could give basic explanations to help me practice the question, it would be greatly appreciated!