left + right is {{ left + right }}

left + 10 is {{ left + 10 }}

right + 10*left is {{ right + 10*left }}

5 * (2 + 3) = {{ 5 * (2 + 3) }}

right * (left + right * (left / 2)) + 10*(2 + 5) is {{ right * (left + right * (left / 2)) + 10*(2 + 5) }}