$\left(x^2+4\right)dy\:-xy\:dx\:=\:0$

$6\cdot\left(5+2\right)$

$8x\:-\:8y\:+\:3x\:-\:5y\:-\:4x\:+\:5x$

$\int\frac{10x+8}{x^2-49}dx$

$\frac{1}{\sec\left(a\right)-1}-\frac{1}{\sec\left(a\right)+1}=2\cot^2\left(a\right)$

$12x^2-4$

$\frac{dy}{dx}=\:2x+1;\:y\left(0\right)=3$