Evaluate
-81^{\frac{1}{m}}\left(2+\frac{7}{3m}\right)^{n}+9^{m^{2}}
Differentiate w.r.t. m
\frac{24\ln(3)m^{4}\times 9^{m^{2}}+7mn\times 3^{\frac{4}{m}}\times \left(\frac{6m+7}{3m}\right)^{n}+28\ln(3)m^{3}\times 9^{m^{2}}+24\ln(3)m\times 3^{\frac{4}{m}}\times \left(\frac{6m+7}{3m}\right)^{n}+28\ln(3)\times 3^{\frac{4}{m}}\times \left(\frac{6m+7}{3m}\right)^{n}}{\left(6m+7\right)m^{2}}
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