Find x3 - 2y2 - 3x3 + z4 if x = 3, y = 5, and z = -3.

-185

-77

-23

85

So will be 27 -50 - 81 +81 = - 23

hope this will help you 

Substitute the given values for x, y, and z in the expression,
                         x³ - 2y² - 3x³ + z^4
                         3³ - 2(5)² - 3(3³) + (-3)^4
The numerical value for the expression is -23. This is the third among the choices. 

Add up all the sides