$\int\left(\frac{\sqrt{121-x^2}}{x}\right)dx$

$4\sin^2+5\cos^2$

$\int\left(x^2+1\right)\left(x^3+3x\right)^5dx$

$\frac{1}{\left(x+7\right)\left(2x+1\right)\left(2x-1\right)}$

$\sqrt{a^3}\cdot\sqrt{b^4}+\sqrt{a^2}\cdot\sqrt{b^2}$

$\frac{d}{dx}\frac{1}{4}x+7x^2+x^3+x^4$

$1-\left(12^3\right)$