add r to 3, triple the result, then divide s by what you have

add r to 3, triple the result, then divide s by what you have

Take this algebraic expression in parts:

1. Add r to 3: 3 + r
2. Triple the result means multiply the result above by 3: 3(3 + r)
3. Then divide s by what you have. s/3(3 + r)