Help me with simplifying rational algebraic expressions?

Question

1.)

15pz + 30pr

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p^2q - 10 pq

2.)

4x^2 - 10x - 6

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2x^2 + 4x - 30

please... just tell me hints how to solve them.. our teacher didn't told us few things... he wanted to us find a way to solve it ourselves.. hope somebody could help me. T_T

Answer 1

1+1/x-1=72/x^2-1