10 [ u ( t − 2 ) − u ( t − 3 ) ] ⏞ x ( t ) ∗ e − t u ( t ) ⏞ h ( t ) {\displaystyle \overbrace {10[u(t-2)-u(t-3)]} ^{x(t)}*\overbrace {e^{-t}u(t)} ^{h(t)}}