$-x^2-10x-75=0$
$\lim_{x\to0}\left(\frac{\sin\left(x^2\right)}{\cos\left(3x\right)}\right)$
$\sqrt[2]{4+\sqrt[3]{27}}$
$-2x+1<3$
$3\left(x+2\right)+2\left(x-1\right)=5x-7$
$\left(x^2+1\right)e^{4x}$
$a^2b^8-c^2$
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