$\left(13.4\right).\left(\frac{22.3}{1}\right).\left(\frac{1}{2.06}\right)$

$\frac{49}{9}x^6-\frac{77}{15}x^3y^2+\frac{121}{100}y^4$

$\left(5-3\right)-\left(4-6\right)$

$-7x\ge-21$

$792\::\:\left(-18\right)=\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:$

$\frac{dy}{dx}\left(2y^3+6x^2y-12x^2+6y=1\right)$

$1=1$