$\left(x+2\right)+\left(x^4+2x+6\right)$

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

$x^{\left(4\right)}y^{\left(2\right)}-2x^{\left(3\right)}y^{\left(3\right)}+x^{\left(2\right)}y^{\left(4\right)}$

$-ih\left[-aksin\left(kx\right)+akcos\left(kx\right)\right]$

$\lim_{x\to\infty}\left(x^2+4x+3\right)$

$\frac{\left(1331m^6+729n^3\right)}{11m^2+9n}$

$\left(\frac{13}{13^4}^3\right)^2$