$\frac{dy}{dx}-y=e^{\left(x+x^2\right)}$
$\left(3z^2+2w\right)^2$
$5^3-6^2-3^3+7^0$
$y'-2xy=2x$
$5x-2=3x+2$
$\lim_{x\to0}\left(\frac{sen^2x}{sen^2y}\right)$
$\frac{\left(tan\:x+1\right)\left(tan\:x+1\right)-sec^2x}{tan\:x}$
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