63)(20-y)/5x
65)(12-19t)/22t
67)(x^2-y^2+7y+5x)/x^2y^2
69)8/3(a+b)
71)(-22x-70)/(x+7)(x-5)
73)(-2b^2-6a)/(9-b^2)
75)23p/9p=23/8
77)(-x-2y)/x^2y^2
79)(x-y)/y
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Answers & Comments
63)(20-y)/5x
65)(12-19t)/22t
67)(x^2-y^2+7y+5x)/x^2y^2
69)8/3(a+b)
71)(-22x-70)/(x+7)(x-5)
73)(-2b^2-6a)/(9-b^2)
75)23p/9p=23/8
77)(-x-2y)/x^2y^2
79)(x-y)/y