What is the value of $-a-b^3+ab$ if $a=-3$ and $b=2$?
This problem involves plugging in the given values of $a$ and $b$ into the expression and simplifying using the order of operations. To make the work easier, I will use parentheses to avoid confusion with the signs. So, $-a-b^3+ab=(-(-3))-(2^3)+(-3)(2)$. Next, I will simplify the exponents and the double negative. This gives me $3-8-6$. Finally, I will subtract from left to right to get the answer. This is $3-8-6=(-5)-6=-11$. 