\starttext \startformula \int_a^b f(x)=I \stopformula Hi all, There are some issue in the OpenType MATH example: \startformula \left|\matrix{1 & 1 & 1 & 1\cr 0 & 2 & 3 & 1\cr 0 & 0 & 3 & 1\cr 0 & 0 & 0 & 2}\right| = 12. \stopformula \setupbodyfont[cambria] $\int_a^bf(x)=I$ \startformula% The symbol of "\int" is looks the same inline equation, displaystyle switched Invalid. \int_a^b f(x)=I \stopformula \startformula% the "|" too short \left|\matrix{1 & 1 & 1 & 1\cr 0 & 2 & 3 & 1\cr 0 & 0 & 3 & 1\cr 0 & 0 & 0 & 2}\right| = 12. \stopformula \setupbodyfont[euler] \startformula % the "|" too short \left|\matrix{1 & 1 & 1 & 1\cr 0 & 2 & 3 & 1\cr 0 & 0 & 3 & 1\cr 0 & 0 & 0 & 2}\right| = 12. \stopformula \stoptext -- Best regards, Ze Huang