Find 3x2 − y3 − y3 − z if x = 3, y = −2, and z = −5

35. You have to plug in all the numbers to the matching variables and solve.

The answer would be 35 

u multiply  the 3 and 3 then multiply the 2 then u take the -2 and then u multiply to get the -6 . then do the same for the other one . then u get 18 +6+6+5=35 

the subtraction signs turn to plus.