1. Visualization

2. Formulae
2.1. In
\[ f(t) = t^2\]
2.2. Out
\[ f(t) = 2t-t^2\]
2.3. In-Out
\[ f(t) =
\left\{
\begin{array}{lr}
2t^2 & t \leq 0.5 \\
-2t^2 + 4t - 1 & t > 0.5 \\
\end{array}
\right.\]