MathJax لا يتم عرضه داخل \u003cdetails\u003e بدون سطر جديد بعد \u003csummary\u003e

You wouldn’t have this problem if you were using details block which is the recommended way:

[details="Example"]
$$
x^2 + y^2 = z^2
$$
[/details]
إعجاب واحد (1)