Evaluate
3m^{2}-6m+2t^{2}
Differentiate w.r.t. t
4t
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2t^{2}+3m^{2}+m-7m
Combine t^{2} and t^{2} to get 2t^{2}.
2t^{2}+3m^{2}-6m
Combine m and -7m to get -6m.
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