% !TeX TXS-program:compile = txs:///pdflatex

\documentclass[margin=5mm]{standalone}
\usepackage{ProfLycee}

\begin{document}

\begin{tikzpicture}[x=0.75cm,y=0.75cm,xmin=-4,xmax=4,xgrille=1,xgrilles=0.5,ymin=-0,ymax=4,ygrille=1,ygrilles=0.5,line join=bevel]
	\GrilleTikz \AxesTikz \AxexTikz[Police=\small]{-4,-3,...,3} \AxeyTikz[Police=\small]{1,2,3}
	\draw[very thick,blue,samples=250,domain=\xmin:\xmax] plot (\x,{exp(\x)/(\x*\x+1)}) ;
	\draw[blue] (2.5,2.5) node[font=\large] {$\mathcal{C}_f$} ;
	\draw (0,-1.25) node {Représentation de la courbe $\mathcal{C}_f$} ;
	%\clip (\xmin,\ymin) rectangle (\xmax,\ymax) ;
\end{tikzpicture}

\end{document}