упростите ....

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(45m^3)/(49p^2) × (- (56p^2)/(27m^2)) : (3m)/p= (- (45m^3 × 56p^2)/(49p^2 × 27m^2)) : (3m)/p= (- (5m × 8)/(7 × 3)) : (3m)/p= - (45m × p)/(21 × 3m))= - (15p)/21= -(5p)/7