- \vrule width 40pt height 0.4pt depth 0pt%
- 積分のテストabc$\displaystyle かきく\int_0^x t\,dt = \frac{x^2}2$
- \vrule width 40pt height 0.4pt depth 0pt\par
+ \vrule width 20pt height 0.4pt depth 0pt%
+ \everymath{\displaystyle}
+ 積分abc%
+ $\int_0^x t\,dt = \frac{x^2}2$,\
+ $\left(\int_D d\omega=\int_{\partial D}\omega\right)$,\
+ $Aあ\kern2pt\vrule width 0.4pt height 10pt depth 10pt
+ \kern-2pt\vrule width 4pt height 0.4pt depth 0pt
+ \hbox{\vrule width 20pt height 0.4pt depth 0pt\kern-20pt Bい}$
+ \vrule width 20pt height 0.4pt depth 0pt