$\frac{3x-1}{x-4}<2$
$sinx=sin\left(\pi-x\right)$
$z^2-10z$
$\left(7x-3\right)\left(2x+4\right)$
$3x^2+6x^3+12x^4$
$\frac{1}{2}\left(-4x^2-9y^2+36\right)^{\frac{1}{2}}^{-1}$
$\left(a^3+6\right)\left(a^3-8\right)$
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