Final answer:
m_PTQ is not well-defined in the given question without additional information or context.
Step-by-step explanation:
The expression m_PTQ is not well-defined in the given question. It seems to be a placeholder or a variable used in an equation, but no specific value or context is provided. It is essential to have more information or context to determine the meaning or value of m_PTQ. Without additional information, it is not possible to give a specific answer to the question.