The exponent is 2 - from the SECOND power.
7 2 = 49
-7 * -7 = +49
7 to the second power
7 x 7 = 49
7 to the second power
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7 x 7 x 7 x 7
7 raised to the second power is the same way as saying "seven squared". Seven squared is equal to 49.
242,121,646
7*6 + 22 - 32 = 42 + 4 - 9 = 37
7 to the second power = 49 (That's 7 times 7)