# Get the nth term of an equation.rhs() sum

Hi

equ0 = term_0 == term_1 + term_2 + term_3

I want to extract term_1 + term_2 to work with.

I have been looking for a long time without success, I read the whole page: link text

example: $ {\left| p\left(\rho_{\epsilon} e^{\left(i \, \theta_{\epsilon}\right)} + w\right) \right|}^{2} = \rho_{0} \rho_{\epsilon}^{m} \rho_{m} e^{\left(i \, m \theta_{\epsilon} - i \, \theta_{0} + i \, \theta_{m}\right)} + \rho_{0} \rho_{\epsilon}^{m} \rho_{m} e^{\left(-i \, m \theta_{\epsilon} + i \, \theta_{0} - i \, \theta_{m}\right)} + \rho_{\epsilon}^{2 \, m} \rho_{m}^{2} + \rho_{0}^{2} $