$2^5.3^{7.}4^2$

$\left(5x+1\right)\cdot\left(5x-1\right)+\left(5x+1\right)^2$

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

$\left(a+\sqrt{b}\right)\left(a-\sqrt{b}\right)=a^2-b$

$\frac{8}{9}x\frac{10}{11}$

$\int\:xe^{52x}dx$

$\left(r^5+4s\right)^2$