VEI (http://www.lojban.org/en/publications/reference_grammar/chapter18.html)

Left mathematical parenthesis: groups mathematical operations. Terminated by VEhO.

li vei ny. su'i pa ve'o pi'i vei ny. su'i pa [ve'o] du li ny. [bo] te'a re
su'i re bo pi'i ny. su'i pa the-number ( ``n'' plus one ) times ( ``n'' plus one )
equals the-number n-power-two plus two-times-``n'' plus 1 $(n + 1)(n + 1) = n2 +
2n + 1$

