- (а + 20) - - а - 20, 8(х - 4) - 8х - 32, (х + 3) * (-3) - -3х - 9, - 7(4 - х) - -28 + 7х, 6(-х + 6) - -6х + 36, - (56х - 6) - -56х +6,

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