Answer
$-1$
Work Step by Step
We are given: $x=-1$, $y=2$, $z=-3$
We take into account the order of operations:
Parenthesis, Exponents, Multiplication/Division, Addition/Subtraction
Thus, we have:
$$(x-xy)^2(z-2x)=(-1-(-1)2)^2(-3-2(-1))\\
=(-1+2)^2(-3+2)=1^2(-1)=-1
.$$
