Solution:
= 51x³y⁴ ÷ - 17x²y²
= -3xy²
= -108a³b³c ÷ 18abc
= -6a²b²
= -84mnp³ by -7mnp³
= 12
= 36p²q²r ÷ -4p²r
= -9q²
= -700x³y² ÷ 25xy
= -28 x²y
= 306a²p³z⁴ ÷ -3a²p²z²
= -102 pz²
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