Multiple Choice Question (MCQ)
Simply \dfrac{12}{m^29}+\dfrac{2}{m+3} , the result is

×
\dfrac{6}{m^29}

×
\dfrac{2}{m3}

×
\dfrac{2}{m+3}

×
\dfrac{2m+6}{m^29}
Simply \dfrac{12}{m^29}+\dfrac{2}{m+3} , the result is
\dfrac{6}{m^29}
\dfrac{2}{m3}
\dfrac{2}{m+3}
\dfrac{2m+6}{m^29}
\dfrac{12}{m^29}+\dfrac{2}{m+3}
=\dfrac{12+2m6}{m^29}
= \dfrac{2(m+3)}{m^29}
=\dfrac{2}{m3}