% just an example of the useage of cursor.sty \documentclass{article} \usepackage{example,cursor} \begin{document} \begin{example} \cursorformula{D^\sigma_{\!x|a} \LRc{f(x) =}{\frac{d^\sigma}{dx^\sigma}} f(x) = \int_a^x f(x) (dx)^{-\sigma}} $$D^\sigma_{\!x|a} \LRc{f(x) =}{\frac{d^\sigma}{dx^\sigma}} f(x) = \int_a^x f(x) (dx)^{-\sigma}$$ $D^\sigma_{\!x|a} \LRc{f(x) =}{\frac{d^\sigma}{dx^\sigma}} f(x) = \int_a^x f(x) (dx)^{-\sigma}$ \end{example} \begin{example} \cursorformula{D^\sigma_{\!x|a} f(x) = \LRc{}{\frac{d^\sigma}{dx^\sigma}} f(x) = \int_a^x f(x) (dx)^{-\sigma}} $${D^\sigma_{\!x|a} f(x) = \LRc{}{\frac{d^\sigma}{dx^\sigma}} f(x) = \int_a^x f(x) (dx)^{-\sigma}}$$ \end{example} \begin{example} \cursorformula{D^\sigma_{\!x|a} \Rc{f(x) = }{} \frac{d^\sigma}{dx^\sigma} f(x) = \int_a^x f(x) (dx)^{-\sigma}} $${D^\sigma_{\!x|a} \Rc{f(x) =}{}\frac{d^\sigma}{dx^\sigma} f(x) = \int_a^x f(x) (dx)^{-\sigma}}$$ \end{example} \begin{example} \cursorformula{ D^\sigma_{\!x|a} f(x)=\frac{d^\sigma}{\Rc{dx^\sigma}} f(x) = \int_a^x f(x) (dx)^{-\sigma} } $${ D^\sigma_{\!x|a} f(x)=\frac{d^\sigma}{\Rc{dx^\sigma}} f(x) = \int_a^x f(x) (dx)^{-\sigma} }$$ \end{example} \begin{example} $${ D^\sigma_{\!x|a} f(x)=\frac{d^\sigma}{\LRc{}{dx^\sigma}} f(x) = \int_a^x f(x) (dx)^{-\sigma} } $$ \end{example} \end{document}