7 + (-4) = 3
(7-4) = 3 as well
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(-4) - (-7) = (-4) + 7 = 3
-7--4=-7+4=-3
4--3= 7 it is the same as 4+3=7. minus a negative is like plus a positive
Negative 7 over 8 minus 4 and 4 fifths = -227/40 or -527/40
It is: 4--3 = 7 which is the same as 4+3 = 7