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plot (Heaviside[t-3] * 2(t-3) * Heaviside[5-t] + 4 * Heaviside[t-5]) from 0 to 10
plot (Heaviside[t-3] * 2(t-3) * Heaviside[5-t] + 4 * Heaviside[t-5]) from 0 to 10
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