Implement Excel COMBINA function #70

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BrianHung wants to merge 1 commit into main from codex/implement-combina-function-in-excel

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BrianHung commented Oct 12, 2025

Summary

add the COMBINA math function with validation and combination calculation
register the function across the parser, dispatcher, and documentation
add unit tests and usage docs for COMBINA

Testing

cargo test test_fn_combina

https://chatgpt.com/codex/tasks/task_e_68dd9c8d42cc8327b4eb3a499c4cb659


          Implement COMBINA function

ccae861

BrianHung added the codex label

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