Вычислите, применяя законы умножения:
а) -3/5*7/11-2/5*7/11
б) 3/4*7/8-3/4*(7/8-2/3)
в) -4/11*15/17-7/11*15/17
г) 13/15*8/19-13/15*(8/19-10/13)
д) -8/19*13/15-8/19*2/15
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