$9x^3+6x^2-12$
$f\left(x\right)=2x-9x+20$
$0.36x^4-1.2x^2y+y^2$
$\frac{dy}{dx}=\frac{3e^x}{y^2},\:y\left(-2\right)=\frac{\sqrt[3]{2e^3+9e}}{e}$
$2z^2-7z-4=0$
$3a^2+8a+5$
$-3\left[+3+2\right]+10$
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