$3\cdot\left(-4\right)^2+\left(-4\right)\left(-3\right)^2+\left(-3\right)\cdot3^2$
$x^2+9x\le0$
$\frac{3x^4-5x^2+8}{2x^3+5x^2}$
$\left(12ya+2c\right)^2$
$2\frac{dy}{dx}=y\left(4-y\right)$
$4-\left(-3\right)^2$
$\frac{12^{-2}}{3^{-2}}$
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