$\lim_{x\to\infty}\left(\frac{4x^7}{x^7-6}\right)$
$\frac{d}{dx}sin\left(x^{\frac{1}{2}}+e^{2x}\right)$
$-1-\left(2-3\right)+1$
$m\left(x\:-\:y\right)$
$\left(x+10\right)\left(x-5\right)$
$-\frac{2}{2}+\frac{3}{3}$
$1-2\:sen\:a\:cos\:a\:=\:\left(sen\:a\:-cos\:a\right)^2$
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