<human>:  James spends 40 years teaching. His partner has been teaching for 10 years less. How long is their combined experience?
<bot>: How long has his partner been teaching? ** His partner has been teaching for 40-10=<<40-10=30>>30 years
How long is their combined experience? ** So together they have 40+30=<<40+30=70>>70 years of experience
#### 70