7. \( t^{2}-12 w \div x \)

This expression could represent various mathematical or physical concepts depending on the context. For instance, if \(t\), \(w\), and \(x\) are variables representing time, work, and a certain measure (like distance or effort), this expression could relate to a specific scenario in physics or engineering where you're modeling motion, energy, or force. When working with such expressions, always remember the order of operations (PEMDAS/BODMAS) to avoid common mistakes. Misplacing a division or forgetting to square a term can lead to incorrect results. Double-check your calculations and ensure you're applying the right mathematical principles!