#### Answer

-765

#### Work Step by Step

Begin by plugging in the given variable value:
$5(-5)^{3}-6(-5)^{2}-2(-5)$
Then we simplify. It is important to keep track of the negatives and keep in mind the order of operations. Evaluate the exponents first and then subtraction and addition.
$5(-5)^{3}-6(-5)^{2}-2(-5)$
=$-625-150+10$
=$-765$