Not sure how Latex is being implemented but there's something wrong with the formulas; and I see this on a variety of pages where math formulas are used.
(1) Sometimes all the formulas in the article are the correct size but they all are in bold (and they shouldn't).
(2) Sometimes the integral sign and the rest of the integral aren't on the same "line", meaning they're not aligned.
(3) Sometimes some parts of the formula are bold and some aren't but none should.
(4) Sometimes part of the formulas are in different size that other parts, e.g. integral sign is too large compared with what's behind it.
P.S. The two-page layout has similar issues.