Subtracting the output of the polyphase filter in ADS

I want to subtract the output of the polyphase filter ....

please see the attacted file... named "polyphase filter.jpg"

Signals may be of different phase and different amplitude....

Please suggest me in each possibility i.e., ... in case of different phase, in case of different amplitudes and in case of when both occur...

You can use controlled sources (VCVS, VCCS, CCCS, CCVS) to add and invert signals.

Didnt get your answer...
plz explain How can I use controlled sources for inverting the signal....

when use VCVS, put ratio as -1 to invert the signal 180 degree