$\left(5a\:+2b\right)^2$

$\left(6f+2g\right)^2$

$\int\:\:-\frac{8x^3}{\left(-2x^4+5\right)^5}dx$

$\left(\frac{11}{13}k-8w^9\right)\left(8w^9+\frac{11}{13}k\right)$

$x2-x+3$

$\int_1^{\infty}\cos\left(x\right)^2dx$

$\ln\left(\lim_{x\to+\infty}\left(1+\frac{3x^2+3x}{x^3}\right)^x\right)$