$$\int_0^{\pi}\left(8sin^4\:x\:cos^2\:x\right)dx$$

$$\int\:\frac{1}{\left(x\right)^2+4}dx$$

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

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

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

$$3x+5yz-2xy+3yz$$

$$\frac{2}{10}x+\frac{4}{5}x$$