si'i _VUhU4 cmavo

trinary mathematical operator: [sigma summation of a using variable b over range c].

On affix form:

sicni: x₁ is a coin/token/is specie issued by x₂ having value x₃ of composition including x₄.

grisumji: x₁ is the sum (combined addition result) of x₂ (plurality of the same type as x₁)
simsumji: x₁ is the sum of all of x₂ added together
snisimsumji: x₁ is the sigma summation of expression x₂ with variable x₃ over domain x₄.
se'au (exp!): mathematical quinary operator; big operator: left sequence notation/converter - operator a, sequence b defined as a function on index/argument/variable/parameter c, in set d, under ordering e