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(15):3-5x(-1) = 3+5 = 8
3x(-7)-7x(-2) = -21+14 = -7
6x(-4)+5x(-9) = -24-45 = -69
(-18):9-(-27):(-1) = -2-27 = -29
24-36:4-7 = 24-9-7 = 8
(-9)-6:(-3)x(-4) = -9+2*(-4) = -9-8 = -17
-9+5x(-11) -1 = -9-55-1 = -65
4x(-1)-3:(-2)-3 = -4+1,5-3 = -5,5