An operation in math is a mathematical action upon numbers resulting in only 1 number.
For example, 12 + -9 = 3 is an operation on two numbers resulting in 3.
An operation can also be performed on only 1 number resulting in only 1 number.
For example, 72 = 49 is also an operation.
8 + 9 = 17
1 + -1 = 0
5 + 0 = 5
175 + 15 = 190
14 - 3 = 11
4 - 10 = -6
18 - 18 = 0
20 - 3 = 17
6 × 5 = 30
4 × -8 = -32
14 × 2 = 28
77 × 1 = 77
40 ÷ 8 = 5
100 ÷ -10 = -10
95 ÷ 5 = 19
28 ÷ 1 = 28
92 = 81
32 = 9
(3/6)2 = 9/36
(1/2)4 = 1/16
√25 = 5
√9 = 3
√169 = 13
√1600 = 40