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We present a series of beautiful, elegant, "simple" and uLique formulas for general tree amplitudes and general loop amplitudes in the dual resonance model. in particular, new result of multiloop amplitudes with external reggeons and pure-reggeon multiloop ampl:tudes are derived. Various rules are given for writingdo'Nn the most gtneral tree amplitudes and loop amplitudes by simply inspecting the corrcsponding Feynman-like diagrams. Simple intuitive interpretations of various factors in.the formulas are also discussed.

General trees and general loops in the unitarization of the dual resonance model