smybol can not be converted right like "\overset|\underset|\mathop|\cdot|\limits|\rightarrow"

[sinslu]

this string can not convert
F(a,n)=\overset{a-a-a\cdots-a}{}ntext{个}a

[roniemartinez]

Resolved in #132 but it is not easy to define the equivalent of \mathop so it is just treated as an identifier