Button code issue

I’ve been trying to past some code from PayPal onto a button on a landing page but when I do it fouls up the entire page and I am no longer able to edit most of the page. Is there something about the following code that is causing the problem?

Code:

I’ve been trying to past some code from PayPal onto a button on a landing page but when I do it fouls up the entire page and I am no longer able to edit most of the page. Is there something about the following code that is causing the problem?

[code]



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