1. The problem mentions the terms Ixx, lyy, izz, kyy, and kxx, which typically represent moments of inertia or related quantities in physics or engineering. 2. To assist you effectively, please provide a specific question or context involving these terms, such as calculating a resultant moment of inertia, combining them, or analyzing a physical system. 3. Without additional information or a clear problem statement, it is not possible to perform calculations or provide detailed explanations.