$2t\frac{dy}{dt}=y^2-3y+3$
$\frac{dy}{dx}=0,15x+20$
$-4-\left(-7\right)-9$
$l^2mas\:l^2$
$x+x+x-x-x$
$3-3-2^2-2-3^2-2-3^2-2^2$
$x^2-\frac{5}{2}x$
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