$-x^3+x^2-3x-2;\:x=-2$
$\:k\:6\:-\:h\:6\:$
$\int\left(x^2e^a\right)dx$
$2-x_{s}+z^{x}z$
$x+x^{-1}=3$
$\frac{dy}{dx}\left(y^2=5x\right)$
$\left(4x-5y\right)\left(16x^2+20xy+25y^2\right)$
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