There is no legitimate "crack" or "free activation key" for MATLAB R2022b. MATLAB is a proprietary software protected by license validation to ensure it is not used on more computers than allowed. Official activation keys are provided by MathWorks via email only after a valid purchase.
If you have a legitimate license, follow these steps to activate R2022b: to your MathWorks Account . Navigate to My Software and select your license.
If you require a permanent free solution for numerical computing, consider these compatible open-source alternatives: : High compatibility with MATLAB scripts.