Simplify. Please show all work.

Question

6b^2 - 4b + 3b^4 - (7b^3 + b^4 - 4b)

Answer 1

6b^2 - 4b + 3b^4 - (7b^3 + b^4 - 4b) = 6b^2 - 4b + 3b^4 - 7b^3 - b^4 + 4b

Combine like terms.