$x^4+6x^2$
$12x^4-46x^3+40x^2$
$0.41p+p+0.48p$
$\left(x^2+1\right)\left(\sqrt{x}-6\right)$
$\frac{\left(x+1\right)\left(x-3\right)}{2}+\ln\left(1+x\right)+\frac{1}{y}$
$\frac{dy}{dx}=\frac{2}{e^y+e^{-y}}$
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