$w+18=14$
$50xdf+25fd+15fz$
$-2-9+13-16-15$
$\frac{x^3-4x^2+5x-8}{x-2}$
$\lim_{x\to\infty}\left(\sin\left(\sqrt{1+x}\right).\sin\left(\sqrt{x}\right)\right)$
$\left(\sin\left(x\right)+\cos\left(2x\right)\right)^2-\left(\sin\left(x\right)-\cos\left(2x\right)\right)^2$
$\left(1+x\right)^{-0.5}$
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