$\int\left(\frac{1}{n\sqrt{4n^2-1}}\right)dn$

$2a+a^2+2a$

$\left(x-y\right).\:\left(x-y\right)$

$5+\left(-4\right).\left(-14-\left(-12\right)\right)$

$-9x^2y\left(-7x^3y^4-8x^{-2}y^2\right)$

$\int\left(5cosx-8x^{0.25}\right)dx$

$\frac{\sqrt{3}}{4}\left(3.5\right)^2$