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plot x=2e^{-3t}sin2t;y=-6e^{-3t}sin2t+4e^{-3t}cos2t from t=0 to 8pi
plot x=2e^{-3t}sin2t;y=-6e^{-3t}sin2t+4e^{-3t}cos2t from t=0 to 8pi
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