$4x^2+9y^2\le24x+18y-9$
$\left(3y+z\right)\left(3y-z\right)$
$\lim_{x\to1}\left(\frac{\sin\left(x\right)\frac{\pi}{x}}{x-1}\right)$
$2\cdot8-10$
$f\left(x\right)=4x^2-12x+9$
$\left(7x-11y^4\right)^2$
$x^2-30+196$
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