$\int\:\:-6x^{-5}\ln\:\left(2x^4\right)dx$
$\frac{7x}{x+3}+\frac{5x}{x+3}$
$y=x^2-7x$
$4+-3^2+2+-3+3$
$\lim_{x\to0}\left(\frac{sinx+3xcosx}{x}\right)$
$\left(wy^2+4\right)\left(wy^2-4\right)$
$sen^2+cos^2+tan$
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