$\left(\frac{4}{2a+3}\right)-\left(\frac{1}{4a-1}\right)$

$\frac{1}{\left(y^2+1\right)}\cdot dy-\frac{x}{\left(x+1\right)}\cdot dx=0$

$\frac{d^2y}{dx^2}\:y=x^4\left(x^3+4x\right)^{-2}$

$\int\left(\frac{6}{x^3-1}\right)dx$

$4\left(d^2-3\right)-\left(d^2-1\right)$

$19.2-52$

$8.527+2.08$