$4-8c-3-4c$
$\int\left(cosx+cos^3x\right)dx$
$\frac{x^5\cdot x^2}{x^4}$
$16+24h$
$\left(x+y\right)\left(2x+6y\right)$
$n2+6n+8$
$\lim_{x\to0}\left(\frac{cos\left(2x\right)-2x^2-1}{sen\left(x^2\right)}\right)$
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