$2x^2-x+2=y$
$\int\sin8f\sin2fdf$
$3x-4y+z=12$
$\left(x^2-2x+1\right)\cdot\left(x-3\right)$
$\frac{dq}{dt}=-4q+12$
$\lim_{x\to\infty}\left(\frac{2x^2-1}{2x^2+1}\right)^{x^2-3}$
$0.7-\sqrt{53}$
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