$\frac{1}{25}x^6+9x^2y^2-\frac{6}{5}x^4y$

$\lim_{x\to\infty}\left(\frac{e^{\sqrt{lnx}}}{x^5}\right)$

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

$\frac{3}{2^{-1}}$

$\frac{\tan y+\cot y}{\sec y\cdot\csc y}=1$

$\int_0^1\left(\frac{x^3}{x^2+1x+1}\right)dx$