$-\left(\frac{28}{-4}\right)$

$\lim_{x\to\infty}\left(\left(x^{\frac{1}{3x}}\right)\right)$

$\left(4y+3\right)-2y-9$

$\int_1^{\infty}\left(\frac{\sqrt{x}}{\left(x+1\right)^2}\right)dx$

$\int\frac{5x}{\sqrt{x^2+1}}dx$

$f\left(x\right)=9x^3+6x$

$\sqrt{x+\sqrt{x+\sqrt{x}}\cdot\sqrt{x}}$