$144x^2-120x+25=0$
$\frac{dy}{dx}=\frac{1}{2+cos\left(x\right)}$
$\frac{dy}{dx}+y=y\left(senx+1\right)$
$6xy+x^2y$
$4x^2-13x+13>0$
$-61+8\left(16\right)$
$5-2\cdot3$
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