I would suggest making it clear, that you also quote the equations, e.g.
We apply the X method [citation], to describe ... The derivations and equations below are cited and summarized from [citation]:
And I would also include the mayor equations in your paper. Not every reader may have access to your sources, and if the equations are necessary to understand your data/approach they should be provided in your text.
By mayor equations I mean final expressions but not the steps how they are derived. As author, ask yourself which equations are necessary to understand the methodology and not common lore in your field.