Question

Will someone help me please?

Answer 1

5bc^4-13 bc^4

Answer 2

when you have addition or subtraction of like terms, you combine the coefficients
like:
ax - bx = (a-b)x
using this
5bc^4-13 bc^4 = (5-13)bc^4

Answer 3

Thank you! <3 @hoblos

Answer 4

any time :)