<!DOCTYPE html> <html> <head><title>Test dir=rtl</title></head> <body> <p> mo (lspace=1em rspace=2em): <math> <mtext>_</mtext><mo lspace="2em" rspace="1em">+</mo><mtext>_</mtext> </math> </p> <p> embellished mrow (lspace=1em rspace=2em): <math> <mtext>_</mtext> <mrow><mo lspace="2em" rspace="1em">+</mo></mrow> <mtext>_</mtext> </math> </p> <p> embellished munderover (lspace=1em rspace=2em): <math> <mtext>_</mtext> <munderover> <mo lspace="2em" rspace="1em">+</mo> <mtext>|</mtext> <mtext>|</mtext> </munderover> <mtext>_</mtext> </math> </p> </body> </html>