Option to disable spellcheck for latex formulas in Markdown

[Friendseeker]

For instance:

$$\dfrac{1}{x}+\dfrac{1}{y}+\dfrac{1}{z}=\dfrac{2}{n}$$

Is being flagged by spellcheck, while the formula is correct.

If the developer feels like such feature should be added, then I am willing to devote my time to work on a PR.