$w+18=14$
$x\left(2x+2\right)=264$
$\int\left(\frac{2x-4}{x^3-4x}\right)dx$
$\lim_{x\to0}\left(\frac{x^n-2^n}{x-2}\right)$
$40-3500$
$x^24x+6$
$\lim_{x\to\infty}\left(x\cdot\sqrt{1-cos\left(\frac{\pi}{2x}\right)}\right)$
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