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[en] This article is devoted to Bc→Bs(*)+nπ decays with n=1, 2, 3, 4. In the framework of factorization theorem the branching fractions of these processes can be written as a convolution of the hard part, describing Bc→Bs(*)W vertices, and spectral functions, that correspond to the transition of the virtual W-boson into a final π-meson system. These functions were obtained from the fit of experimental data on τ-lepton decay and electron-positron annihilation. Using different sets of Bc→Bs(*)W decay form-factors we present branching fractions and distributions over the invariant mass of the final π-meson system.