[docu [call font [[family "AR PL UMing TW"]] 123]

[call font [[family "AR PL UMing TW"]] 123]
456
[call font [[family "AR PL UMing TW"]] "789漢字"]

\[7 8 9 \] = \[[+ 5 2] 8 9\]

[call font [[family "AR PL UMing TW"]] 巨集轉換]

\[def-syntax foo \[\[_ x \] \[* x x\]\]\]

[def-syntax foo [[_ x][* x x]]]

8 * 8 = [foo 8]

]