1. **State the problem:** Simplify the expression $4 + 7h + h + 11 + 4j + 4h$. 2. **Combine like terms:** Group the constants and the terms with $h$ and $j$ separately. 3. Constants: $4 + 11 = 15$ 4. Terms with $h$: $7h + h + 4h = (7 + 1 + 4)h = 12h$ 5. Terms with $j$: $4j$ 6. **Write the simplified expression:** $15 + 12h + 4j$ 7. **Check the given equation:** $12h + 15j + 4h = 31hj$ is unrelated to the simplification above and seems incorrect or unrelated. **Final simplified expression:** $$15 + 12h + 4j$$