-20 - -5+(-15)=, -9 - 3+(-12)=, 1 - 15+(-14)=, -4 - 7-11=, -15 - 26-41=, -6 - 17-23=, -39 - -28-11=, 20 - 16-19+23=, -40 - -16+32-56= , -14 - 19+42-75=, 4 - 18-(9-(16-8)+13)=, 39 - 18+(8+(6-17))+4, -22 - 6-(17-(-15))+4=,

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