$\frac{2}{3}w+\frac{38}{3}=32$

$-13\:+\:-1\:+\:1\:+\:-17\:$

$\frac{d}{dx}x^2siny-\frac{3x}{y}=x^5$

$\lim\:_{y\to\:0}\left(\frac{1-\sqrt{1-4y\left(x-y\right)}}{2y}\right)^2$

$\sec\alpha-\sen^{2}\alpha\cdot\sec\alpha=\cos\alpha$

$\left(2t-1\right)\left(t+5\right)$

$\sqrt{\left(-2-6\right)^2+\left(2-2\right)^2}$