[tex]f(x)=\left\{\begin{array}{ccc}7-x&if&x\leq-2\\4x^2&if&-2<x\leq0\\|x|+9&if&x>0\end{array}\right\\\\f(-3)\to x=-3\leq-2,\ \text{therefore we use the first piece of function}\\\\\text{For}\ x=-3,\ f(x)=7-x.\ \text{Substitute:}\\\\f(-3)=7-(-3)=7+3=10[/tex]
