$\frac{\sin\frac{2}{x}}{\frac{1}{x}}$
$\int2sin\left(ln\left(x\right)\right)dx$
$3x=180$
$\frac{3-2x}{x+2}=3x$
$\frac{a^2-2a-3}{a+3}$
$\left(n-9\right)\left(n-4\right)$
$\int\left(x^4+2\right)^23x^2dx$
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