In campaign Random rolls
1d3+1d3+1d3+1d3+1d3
13
Breakdown:
DiceRoll[1d3]
→
2
DiceRoll[+1d3]
→
2
DiceRoll[+1d3]
→
3
DiceRoll[+1d3]
→
3
DiceRoll[+1d3]
→
3