$\cot\:\left(-x\right)\cos\:\left(-x\right)+\sin\:\left(-x\right)$
$\int\frac{1}{\sqrt{64-9x^2}}dx$
$\frac{dy}{dx}=y\left(xy^5+4\right)$
$\int_{0.5}^1\left(\frac{\arccos\left(\sqrt{x}\right)}{\sqrt{x}}\right)dx$
$6\cdot2.83\cdot4.47$
$\frac{2x^3+3x^2+3x+1}{x^3-1}$
$3x^2+8x+3=0$
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