$\left(\frac{1}{3}+4x\right)^2$

$\lim_{x\to\frac{\pi}{2}}\left(\frac{1+\cos\left(2\pi\right)}{\frac{\pi}{2}\left(\pi-2x\right)^2}\right)$

$4ab+5abc+6abcd$

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

$( 3 a + 1 ) ^ { 2 }$

$y'=\:3\cdot x^2+3x$

$x^3-4x^2-3x+18$