counting capture lesson

First of all, if you play Bxd5 first, black will not play Rxd5, it would be foolish to give up his rook for your bishop. So you win only the pawn either way.
Second, all this "rook takes pawn, rook takes rook, then bishop takes rook" talk is really confusing and makes it hard for others to understand what you are trying to say. It is only a small effort to learn chess notation, and it's worth it.