Brain teaser 3

Today for math we had to come up with an answer for the picture below she basically what we did is we had to use pacific numbers and equations to make up and answer to 142 so basically the martian marshals had to arrange seating for 142 others and we had to do the question you'll see how I done it but I done this in a group Nirvana,Carla,Hollie and Ayla were in my group.

I found it hard to come up with the exact answer without using mixed equations.
I found it easy to do all the equations with them being mixed.