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1. Visualization

comparison

2. Formulae

2.1. In

\[ f(t) = t^2\]

2.2. Out

\[ f(t) = 2t-t^2\]

2.3. In-Out

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