"; echo "2 ** -3 = 1 / (2**3) = " . (2 ** -3) . "
"; echo "2.5 ** 3 = 2.5 * 2.5 * 2.5 = " . (2.5 ** 3) . "
"; echo "2.5 ** -3 = 1 / (2.5**3) = " . (2.5 ** -3) . "
"; echo "-2.5 ** -3 = " . (-2.5 ** -3) . "
"; echo "2**3 * 2**3 = 8*8 = " . (2**3*2**3) . "
"; echo "2**(3*2)**3 = 2**(6**3) = " . (2**(3*2)**3) . "
"; ?>