The context of the following conversation is It took a lot of time, but Robin finally reached Tracy's level.:
Tracy says I don't take for granted how skilled I am..
The friend responds You are a pretty humble person, Tracy..
Tracy responds It took a lot of years to master mathematics..
The friend responds I imagine it's very tough. Robin is highly skilled in math as well..
Tracy responds Yes, I would say he's finally reached my level after several years..
The friend responds I'm sure it was extremely difficult for him to do that..