$f\left(x\right)=\left(3x+2\right)^2$
$\left(-3+6k\right)^2$
$\frac{dy}{dx}+2y^3x^2=0\:;\:y\left(1\right)=-2$
$10x^2-x<6x-10x^2+40$
$2x^2+9x-5$
$-2\left(-3-3x\right)+1$
$-49+25a^440a^3+16a^2$
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