$\frac{4^2-121}{2n+11}$
$\int_0^1\left(\frac{9x+7}{e^x}\right)dx$
$\left(10-\sqrt{2i}\right)^3$
$\int-\frac{14x+117}{\left(x^{2\:}+16x+69\right)\left(x+8\right)}dx$
$30-\left(-20\right)$
$45x+30$
$6xy+2yx+xy$
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