1
We help each other.
Sign 'WE' by pointing from your dominant shoulder to your non-dominant shoulder. Then, use the circular thumbs-up motion for 'EACH-OTHER', followed by the sign for 'HELP' moving back and forth to show mutual support.
2
They look at each other.
First, point to the people around you to establish 'THEY'. Next, perform the 'EACH-OTHER' sign to show mutuality. Finally, sign 'LOOK' using the 'V' handshape with both hands, pointing the fingers toward each other to show their gazes meeting.
3
Let's talk to each other.
Sign 'TALK' using the '4' handshape tapping near your chin. Then, perform the 'EACH-OTHER' sign with your extended thumbs circling one another. This combination clearly shows a mutual exchange of conversation rather than just one person speaking.