-64
It is: 64-1 = 63
70 minus 64 is 6.
76 minus 64 is 12.
64 minus 24 is 40.
75 minus 64 is equal to 11
64 minus 28 is 36.
4-3 = 1/64
Such that 64 is equal to 26, or two to the power six, 1/64 is equal to 2-6, or two to the power minus six.
64 - 8 = 56
130 - 64 = 66
64 - 9 = 55