Step-by-step explanation:
Lets plug in the numbers for each equations:
1. 4 x 3 + -5 = 7
and 4 times 3 equals 12. minus 5 is 7.
2. 4^3 is just 64
3. -5--5
we can just change the double negative to a plus:
-5 + 5 = 0
