Me ajude a efetuar as divisões?

a)x/a+1: x4/a²-1

b)x-y/7x-7y: x²+xy/7x

c)a²-1/x²-y²: a²-2a+1/3x+3y

d) m²-36/x²y²: 2m-12/xy²

e) 3a4/x7+x6: 9a²/2x+2

f) x²+x+1/x²+1: x³+x²+x/x4-1

Preciso de calculo!!

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