$\frac{\left(17+z\right)}{\left(5-11z\right)}<=-\frac{1}{2}$
$2xyz;\:x=1;\:y=2=z=3$
$\frac{4x^4+8x^3+10x^2}{2x}$
$25x^2+16<40x$
$2h^2-5h=-1$
$f\left(x\right)=-18x^2+2x$
$\left(-2x^2+2\right)$
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