That answer is quite close but probably by accident. Don't get me wrong, I am in absolute awe of these beasts:
Me:
"Take a simply supported beam 10m long. Apply a force of 1000N at 2m from the left of that beam. What is the bending moment at 5m from the left?"
It:
"blah blah blah ... Therefore, the bending moment at a point 5 meters from the left end of the beam is 600 Nm."
It's probably correct here but I will have to check. I've just read its reasoning and it does look correct on a superficial reading after two very large glasses of wine. Sadly it fails to note that I spelled metre in the French way - obviously, because I am English.
Change the name of expert mode. You're having to tell each single user to turn it on, because probably like me they think it means "answer as if talking to an expert"