Question: User: 6 + 3 H E P ||

1. The problem is to evaluate the expression $6 + 3$. 2. The formula used here is simple addition: $a + b = c$ where $a$ and $b$ are numbers. 3. Adding $6$ and $3$ gives: $$6 + 3 = 9$$ 4. The letters "HEP" and the vertical bars "||" do not affect the arithmetic calculation. 5. Therefore, the final answer is $9$.