$\left(3a+2b^4\right)^2$

$\lim_{n\to infinity}\left(1-\frac{\left(z-\frac{w}{n}\right)^{an}}{z^{an}}\right)$

$3x\left(2x+1\right)^2-2\left(x-3\right)\left(x+3\right)$

$\lim_{x\to0}\left(\frac{5-5cosx}{cos3x}\right)$

$f\left(x\right)=\sqrt[3]{27x^3-x^2}-3x$

$9x+9x+1$

$-2x-3\le-7$