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divide and simplify

5y-5/21 divided by y-1/33y

2 answers

oh well, I suppose if you knew the how and why of parentheses you would not have asked the question in the first place.
I am going to guess at what you might mean.

[ 5(y-1)/21 ] / [ (y-1)/(33y) ]

5 (33y)/21 = 5(11y)/7 = (55/7) y
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