I have a formula under which I need te put a drawing explaining part of the formula, I have the following MWE:
\documentclass{beamer}
\usepackage{tikz}
\usetikzlibrary{chains,shapes.multipart}
\usetikzlibrary{shapes,calc}
\usepackage{amsmath}
\usepackage[utf8]{inputenc}
\usetikzlibrary{automata,arrows,shapes,snakes,automata,backgrounds,petri,positioning}
\usetikzlibrary{calc}
\begin{document}
\begin{frame}
$F(t+\Delta, 0) = \underset{\begin{tikzpicture}[scale = 0.7]
\draw[->, thick] (-0.1,0) -- (2,0);
\draw[->,thick] (0,-0.1) -- (0,2.3);
\draw[-, thick] (0.3,-0.1) -- (0.3,0.1) node[inner sep=1pt,at start, anchor=north] (A) {$t$};
\draw[-, thick] (1.7,-0.1) -- (1.7,0.1) node[inner sep=1pt,at start, anchor=north] (A) {$t+\Delta$};
\draw[-, very thick, color=red!100] (0.3,0) -- (1.7,0);
\end{tikzpicture}}{\underbrace{F(t,0) - \lambda \int_{v = 0}^{\Delta}\overline{C_d}(t+v,0)dv}} + \int_{v=0}^{\Delta} f(t+v, \Delta - v) du + o(\Delta)$,
\end{frame}
\end{document}
which produces the following result:
I would like this picture to be drawn under directly under the curly braces.