$\frac{ds}{dt}=\frac{\left(2t+1\right)\left(2s-1\right)}{2\left(t^{2}+1\right)}$
$\int\sqrt{x^4+2x^2-1}dx$
$27\cdot4$
$\log\left(\sqrt{a}\right)$
$3x^2-27<0$
$\lim_{x\to\infty}\left(\frac{e^{2x}}{x^2}\right)$
$\left(28x^2-140x+168\right).\left(2x\:-8\right)$
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