Powers and Roots: Solving an exercise

Solve the following exercise and circle the correct answer:

$4^2-4^3=$

-48

Solve the following exercise and circle the correct answer:

$7^1-7^2=$

$-42$

Solve the following exercise and circle the correct answer:

$6^3-6^2=$

180

Solve the following exercise and circle the correct answer:

$5^2-4^1=$

21

Solve the following question:

$2^4-4:2^2=$

15

Solve the following exercise and circle the correct answer:

$4^2:2+5^2=$

33

Solve the following exercise and circle the correct answer:

$5^2-4^2+2^2=$

13

Solve the following question:

$3-(5^2:5)^2+7^2=$

27

Solve the following question:

$(4^2:8):2+3^2=$

10

Solve the following question:

$(18-10)^2+3^3=$

91