$32+20-9-13+4-5$
$\lim\:_{x\to\:0}\left(\frac{e^x\cdot\:\sin\:\left(x\right)-x}{2x^2+x}\right)$
$\frac{dy}{dx}=-\frac{5}{\left(2\sqrt{3-5x}\right)}$
$tanx=\:\frac{1-cos\left(2x\right)}{sin\left(2x\right)}$
$3x^2+2x-8x^2+7-2x+5$
$450+450$
$5x^3-6x^2+2x-1$
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