$x\frac{dy}{dx}-2y=2x$

$\int y\left(y^2+3\right)^5dx$

$\int_6^{\infty}\left(\frac{9}{-x+x^2}\right)dx$

$\lim\:_{x\to\:0}\left(\frac{1-5^{\frac{1}{x}}}{1+5^{\frac{1}{x}}}\right)$

$-\left[-\left(-20\right)-3\right]+\left(3-4\right)-2.\left(5-1\right)+-5-7-\left[-5-7\right]+\left(-8\right)-6+7+1-20\left(-1-4\right)-8$

$1+\sqrt[3]{-3.375}$

$\left(2x+7\right)\left(3y\right)$