$\frac{m^{18}-x^{18}}{m^3+x^3}$
$\left(10m+4n\right)\left(10m\:-4n\right)$
$\int\frac{1}{4x^2+6x+16}dx$
$140+570+300+1200+800+200+300$
$4x^2-10x-6$
$e^{-3}=m$
$\frac{3x-9}{2x+8}$
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