$-4\left(1-8n\right)+7n$
$2xy+6x$
$\frac{x^2+11x+10}{x+1}$
$\frac{x^6-27a^3}{x^2-3a}$
$\frac{1}{t}\frac{dx}{dt}+t^2x=0$
$\int e^{5x}dt$
$sen\theta\:+cos\theta\:=1$
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