multiply and find the excluded value(s)
d^2+1/d+7*5d/d-1d
Is this what you mean?
d^2+1/d+(7*5d/d)-1d
d/d = 1
Multiply by d.
d^3 + 1 + 35d - d = ?
d^2+1/d+7*5d/d-1d
d^2+1/d+(7*5d/d)-1d
d/d = 1
Multiply by d.
d^3 + 1 + 35d - d = ?