Is there a general equation for the Strong Interaction?
Yes -- the Langrangian is the Yang-Mills Lagrangian with the gauge group SU(3). ie
L= phibar(i*Dslash)phi - 1/4 * (F^i_uv)^2 -m*phibar*phi
where phi is the fermion (quark) field, F^i_uv is the gluon field tensor(s), m is the fermion mass, and D is the covariant derivative for SU(3).
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