  Formulas to calculate multivector exponentials in a base-free representation
and in a orthonormal basis are presented for an arbitrary Clifford geometric
algebra Cl(p,q). The formulas are based on the analysis of roots of
characteristic polynomial of a multivector. Elaborate examples how to use the
formulas in practice are presented. The results may be useful in the quantum
circuits or in the problems of analysis of evolution of the entangled quantum
states.
