$x^2+3x+5;x=-1$
$\int27\sin\left(9x\right)dx$
$4x^4-45x^2+81$
$5+3x<4-x$
$\int\frac{\left(x+1\right)^2}{x^{\frac{1}{2}}}dx$
$\lim_{x\to0}\left(\frac{4xln\left(3x+1\right)}{1-e^{2x}}\right)$
$\frac{dy}{dx}=\frac{1+y^2}{\left(x+3\right)^5}\:y\left(-2\right)=0$
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