5m^3n^3 / 10m
Would it be..
1m^2n^3 / 2
Would it be..
1m^2n^3 / 2
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Looks right. You don't really need the 1 in the numerator (the 1 multiplier is implied, so putting it there is a little redundant; it doesn't make the answer wrong, just messier looking). Great job!