$\lim_{x\to\infty}\left(x\cdot\left(\sqrt{x^2+17}-x\right)\right)$
$2\left(7\right)+4\left(9\right)$
$3b\left(a+b+c\right)$
$\frac{d^2y}{dx^2}=\cot\left(x\right)$
$x^2-6x+12$
$\left(x+1\right)\left(x^2-x+1\right)\left(x^6-x^3+1\right)x^9$
$x^2+2\cdot x\cdot10+10^2$
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