Answer
$(w+x) - (y+z)$
Work Step by Step
At memory location 50: ADD 201, 202
At memory location 51: ADD 203, 204
At memory location 52: SUBTRACT 201, 203, 200
The instruction ADD 201, 202 will store w+x at w.
Then the instruction ADD 203, 204 will store y+z at y.
Finally SUBTRACT 201, 203, 200 will store the new value of w - new value of y at v. The final value of v will be $$(w+x) - (y+z)$$
