Non trivial ret types, fixed math module #7602

Job	Run time
Build LPython to WASM	7m 13s
LPython CI (3.10, macos-latest)	6h 0m 17s
Check Debug build	6h 5m 1s
Test PIP Installable Packages	2m 53s
LPython CI (3.10, ubuntu-latest)	6h 0m 15s
LPython CI (3.10, windows-2019)	14m 57s
Check Release build	6h 5m 0s
Test CPython Interop (@pythoncall)	3m 2s
Run Integration tests with Python 3.10	3m 23s
Run SymPy tests	6h 0m 18s
Run Integration tests with Python 3.9	3m 22s
Run Integration tests with Python 3.11	3m 9s
Run Integration tests with Python 3.12	3m 19s
Test LLVM 16	6h 0m 18s
Build Jupyter Kernel	4m 4s
Test LLVM 10	6h 0m 16s
Test LLVM 15	6h 0m 19s
Upload Tarball	50s
	2d 0h 57m 56s

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