42 + 5 = 16 + 5 = 21
2-21 power = -19
91 to the 2nd power is 8,281.
3x2 = 21 describes two single values, and does not have an x intercept. 3x2 = 21 ∴ x2 = 7 ∴ x = ±√7
4 to the 2nd power in exponents is 42
3 raised to the 2nd power is 9
25
(21)1
2121 = 5.842587018*1027
25a2
4C2 * (-2CD2) = -8C3D2
1.39 times 10 to the 2nd power is 139