Question

2(2-5t)+t^2(t-1)-(t^4-2)

Answer 1

2(2-5t)+t^2(t-1)-(t^4-2)

distribute

4 -10t +t^3-t^2 -t^4 +2

combine like terms

-t^4 +t^3 -t^2 -10t +6