## Precalculus: Mathematics for Calculus, 7th Edition

$-t^{4}+t^{3}-t^{2}-10t+5$
Expand the brackets, be mindful of any negative signs: $=4-10t+t^{3}-t^{2}-t^{4}+1$ Collect the like terms: $=-t^{4}+t^{3}-t^{2}-10t+5$