test -- Sage

integrate(1/(1+x^2),x); show(integrate(1/(1+x^2),x,-1,1))

arctan(x)
\newcommand{\Bold}[1]{\mathbf{#1}}\frac{1}{2} \, \pi

arctan(x)
\newcommand{\Bold}[1]{\mathbf{#1}}\frac{1}{2} \, \pi

test