# Awkward spacing for integral in exponent

I'm trying to put an integral in an exponent with the following LaTeX:

\begin{align*}
e^{G(t)} &= e^{\int{\frac{t}{1+t^2}dt}} \\
&= e^{\frac{1}{2}\ln(1+t^2)} \\
&= \sqrt{1 + t^2}
\end{align*}


however, the result is this:

the spacing between the integral and the fraction looks very awkward. I looked into display mode, but that just makes the integral abnormally large. Is there anyway to get rid of that spacing?

Some alternatives:

\documentclass{article}
\usepackage{amsmath}

\begin{document}

\begin{align*}
e^{G(t)} &= e^{\int\frac{t}{1+t^2}dt} \\ % original
e^{G(t)} &= e^{\int\!\frac{t}{1+t^2}\,dt} \\
e^{G(t)} &= \exp\Bigl(\int\frac{t}{1+t^2}\,dt\Bigr) \\
e^{G(t)} &= \exp\bigl({\textstyle\int\frac{t}{1+t^2}\,dt}\bigr) \\
&= e^{\frac{1}{2}\ln(1+t^2)} \\
&= \sqrt{1 + t^2}
\end{align*}

\end{document}


• The \! seems to move it enough to not annoy me, thank you! Unrelated, is \exp an acceptable alternative to e^n? I've never seen that notation before. – ryanyz10 Jan 20 '18 at 0:59
• @ryanyz10: \exp(...) for e^{...} is quite standard. – GuM Jan 20 '18 at 1:19

Does this befit you?

\documentclass{article}
\usepackage{mathtools, graphicx}

\begin{document}

\begin{align*}
e^{G(t)} &= e^{\int{\mkern-7mu\frac{t}{1+t^{\scalebox{0.8}{$\scriptscriptstyle2$}}} dt}} \\
&= e^{\frac{1}{2}\ln(1+t^2)} \\
&= \sqrt{1 + t^2}
\end{align*}

\end{document}


• @Mico: thanks. Still I hope my proposition is not totally unworthy :–) – Bernard Jan 20 '18 at 2:24
• I like either anwers of Bernard and egreg. I vote always your answer. Too for Mico and marmot. +1. – Sebastiano Jan 20 '18 at 8:14