$2sin^2x+3cosx-3=0$
$\frac{x^{-4}x^2}{x^2}$
$7,5-0,75+2,015$
$\frac{dy}{dx}=2x-9y$
$\left(x-y+6\right)\left(x+y+6\right)$
$9x^2-36x+4y^2=0$
$\sqrt{3}-2\cos\left(x\right)=0$
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