$\frac{x^2+10x+x}{\left(x+2\right)\left(x+4\right)}$

$\frac{12x^3+18x^2+18x+1}{4x^2+2x}$

$\int\left(9x^3e^{4x}\right)dx$

$\frac{\cos\left(thta\right)\left(1-\cos^2\left(\theta\right)\right)}{\cot\left(\theta\right)\left(\sec^2\left(\theta\right)-1\right)}$

$\left(\frac{4y^2}{3}+5\right)\left(\frac{4y^2}{3}-5\right)$

$7 x + 3 \geq 5$

$\frac{d}{dx}\left(x^3+y^3+z^3+6xyz=18\right)$