Question

(8a^4+(4a+6)−a^2)−(7a−(7a^3−7a^2+5a)−5(a+6)) =

Answer 1

ooh, this will take long, but did you simplify each side first? Like get the similar terms alone, then multiply the - out to all the terms on the inside?

Answer 2

It's a really long extension of PEMDAS so xD

Answer 3

8a^4 +4a+6-a^2-7a-7a^3-7a^2+5a-5a-30

Answer 4

now make sure you get similar terms together and simplify again ;p