$\left(3n^3\cdot2n\right)^3$

$9x^2+12x+4\le0$

$\cos\left(3\right)^2+2\cos\left(3.025\right)^2+2\cos\left(3.05\right)^2+2\cos\left(3.075\right)^2+\cos\left(3.1\right)^2$

$2x+5y-14x+15y-6x-10y$

$x^2yz+xy^2z-xyz^2$

$\int\frac{d\cdot x}{\left(x-3\right)\left(x-1\right)^2}$

$\cos\frac{\pi}{2}-x\cdot\sec\left(x\right)$