# Symbolic Integration for hard expressions and generate function

**URL:** <https://discourse.julialang.org/t/symbolic-integration-for-hard-expressions-and-generate-function/124744>\
**Category:** New to Julia\
**Tags:** integral, symbolics, sympy\
**Created:** [January 13, 2025, 10:06pm UTC](https://discourse.julialang.org/t/symbolic-integration-for-hard-expressions-and-generate-function/124744 "2025-01-13T22:06:54Z")\
**Posts on this page:** 1\
**Showing post:** 8

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**Author:** ![MechRob](https://avatars.discourse-cdn.com/v4/letter/m/f17d59/32.png) [@MechRob](https://discourse.julialang.org/u/MechRob)\
**Post date:** [January 22, 2025, 4:02am UTC](https://discourse.julialang.org/t/symbolic-integration-for-hard-expressions-and-generate-function/124744/8 "2025-01-22T04:02:34Z")

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Hello Chris,

Thank you for your reply. I didn’t know this was possible. Could you please direct me to an example or some code that demonstrates this?

I have another, more important question. After calculating my functions and calling `build_function`, it seems that because my expression is lengthy, the function generated by `build_function` cannot be parsed, and I’m encountering errors afterward. Do you have any workaround for this issue? I have also reported this on [GitHub](https://github.com/JuliaLang/JuliaSyntax.jl/issues/529).

I should mention it is not for the expression in the codes above, it is a more complex expression.

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