-28
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plus times plus = plus minus times plus = minus plus times minus = minus minus times minus = plus so when you subtract a number it is the same as adding its negative; for example 7 - 4 = 3 7 + (1)(-4) = 3
(7 x 10) - 4 = 66
-4 + -3 = -7
4*7*5+7^2-3*0+15 = 140+49-0+15 = 204
It is plus 4