1. The symbols \(\nabla\) and \(\Box\) are commonly used in vector calculus and physics. 2. \(\nabla\) is called "del" or "nabla" and represents the vector differential operator \(\left(\frac{\partial}{\partial x}, \frac{\partial}{\partial y}, \frac{\partial}{\partial z}\right)\). 3. \(\Box\) is often used to denote the d'Alembertian operator in physics, defined as \(\Box = \frac{\partial^2}{\partial t^2} - \nabla^2\), where \(\nabla^2\) is the Laplacian operator. 4. Without additional context or an expression involving these operators, no further simplification or calculation can be performed. 5. Please provide a complete expression or specify the operation you want to perform involving \(\nabla\) and \(\Box\).