$4sin^2x=5-4cosx$
$\lim_{x\to\infty}\left(\frac{\sqrt{x^2+1}}{\sqrt[3]{x^3-3}}\right)$
$\frac{3}{2-8x}$
$\left(2d+3\right)\left(3d+4\right)$
$\frac{x^4+2}{x^2+6x+6}$
$\frac{3}{x+y}+\frac{2}{x-y}$
$\int\frac{x}{x^2+5x+2}dx$
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