$\frac{n}{4}-2=2$
$\int\left(\frac{1}{\sqrt{28-12x-x^2}}\right)dx$
$2xy+xy-x$
$-8x+11x^2-20x+x^2-9x+5$
$5+5\cdot f$
$\frac{\csc\left(x\right)^2-\sin\left(x\right)^2}{\csc\left(x\right)+\sin\left(x\right)}$
$\left(\frac{2}{3}m^3-\frac{1}{2}m^2-\frac{3}{5}m\right)^2$
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