Is a power symbol, which means the power of a number. For example, 5 2 represents the square of 5, 7 6 represents the sixth power of 7, and 9 (-2/3) represents the negative two-thirds power of 9.

√ is the square root symbol, indicating the square root of a number. For example, √4 is the square root of 4, which is equal to 2.