$-4k^2-44k-121$
$-3+\left(\left(\left(-8\right)-\left(-5\right)\right)+12\right)$
$2x^2+5x^2-1$
$x^8+z\:sin\left(xyz\right)=0\:$
$40^{4}+8a^{2}b^{2}+9b^{4}$
$\frac{6x^2+4x+3}{2x}$
$\left(x-4\right)\left(3x+4\right)$
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