Explanation:
An exponent is a symbol written above and to the right of a mathematical expression to indicate the operation of raising to a power.
Example: 2^4
2x2x2x2 You multiply 2 by itself 4 times.
A lot of people get confused and multiply 2x4, which is wrong.
2x2=
4x2=
8x2=
16x2=
32x2=
64x2=128
So 2^7 is 128.
Now onto 7^2...
This, you just multiply 7x7, which is easy. 7x7=49
Now you multiply 128 and 49.
128x49=6272
hope it helps!