$x^22x+50$
$\left(x-2\right)\cdot\left(4x-7\right)$
$\lim_{x\to\infty}\left(\frac{\left(ln\left(x\right)\right)^2}{4x}\right)$
$\lim_{x\to1}\left(\frac{2x-2-2ln\left(x\right)}{ln\left(x\right)\left(x-1\right)}\right)$
$300x+250$
$c^2+6c+27$
$\int9x^2e^{4x+1}dx$
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