$\lim_{x\to\infty}\left(\sqrt{x^2+8x}-x\right)$
$\frac{7}{1-x^8}$
$\frac{d}{dx}\ln\left(3x+y\right)+2e^{\left(2x+3y\right)}=10x+y^2+5$
$5a+10b-5a-9b$
$y^2-30y+20$
$\int\left(3x+5\right)^2dx$
$\int\frac{\left(1+cos^2\:x\right)}{\left(cos^{2\:}x\right)}dx$
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