# Copy/Paste math.js expression?

**URL:** <https://forum.bubble.io/t/copy-paste-math-js-expression/7718>\
**Category:** Questions\
**Created:** [November 8, 2016, 5:02pm UTC](https://forum.bubble.io/t/copy-paste-math-js-expression/7718 "2016-11-08T17:02:16Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![jbrucew](https://avatars.discourse-cdn.com/v4/letter/j/5daacb/32.png) [@jbrucew](https://forum.bubble.io/u/jbrucew)\
**Post date:** [November 8, 2016, 5:02pm UTC](https://forum.bubble.io/t/copy-paste-math-js-expression/7718/1 "2016-11-08T17:02:16Z")

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I’m using the API Connector(old) to make a post to math.js to perform a calculation based on dynamically pulled data. I have to recreate this many times and there are a lot of values at play. Is there a way to insert dynamic data into the body of the api post under the “Plugins” tab?

I see text that reads (JSON object, use \_\_\_ for dynamic values) but I don’t know what the symbol in the blank space is.

Any help?

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**Author:** ![jbrucew](https://avatars.discourse-cdn.com/v4/letter/j/5daacb/32.png) [@jbrucew](https://forum.bubble.io/u/jbrucew)\
**Post date:** [November 8, 2016, 5:21pm UTC](https://forum.bubble.io/t/copy-paste-math-js-expression/7718/2 "2016-11-08T17:21:10Z")

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And now I’m realizing my new api connector won’t intialize. I receive an error that says “Internal server error”. Everything is set up exactly as it is in the old api connector…

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**Author:** ![Kfawcett](https://sea1.discourse-cdn.com/bubble/user_avatar/forum.bubble.io/kfawcett/32/38097_2.png) [@Kfawcett](https://forum.bubble.io/u/Kfawcett)\
**Post date:** [November 8, 2016, 6:03pm UTC](https://forum.bubble.io/t/copy-paste-math-js-expression/7718/3 "2016-11-08T18:03:09Z")

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Take a look at this [https://forumapp3.bubbleapps.io/version-test/math\_js?debug\_mode=true](https://forumapp3.bubbleapps.io/version-test/math_js?debug_mode=true). The “Calculate New API” button is using the new API connector.

Edit page: [Forumapp3 | Bubble Editor](https://bubble.io/page?type=page&name=math_js&id=forumapp3&tab=tabs-1)

Here’s the setup for the connector.

 ![](https://us1.discourse-cdn.com/bubble/original/2X/9/92d70fdcc68bd7721ca1a9e8e4c9bfa9b3db466e.png)