3/m + 5/n = (3n + 5m)/(mn)
4/x - 3/(xy) = (4y - 3)/(xy)
7/(9ab) - 13/(12ab) = (28 - 39)/(36ab) = -11/(36ab)
1) 2) 3)
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3/m + 5/n = (3n + 5m)/(mn)
4/x - 3/(xy) = (4y - 3)/(xy)
7/(9ab) - 13/(12ab) = (28 - 39)/(36ab) = -11/(36ab)
1) 2) 3)