42 to the second power, also known as 42 squared, 422 = 42 x 42 = 1764.
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42*63 = 3456
4-2 = 1/42 = 1/16 = 0.0625
8 divided by 2 = 4 4 to the second power (42) = 16 The square root of 16 = 4
3x2 - 15x + 42 = 3*(x2 - 5x + 14) which cannot be factorised further.
The same as 42 to the power of 5 but negative