sumji -suj- gismu

x1 is a mathematical sum/result/total of x2 plus/increased by x3.

See also jmina, jalge, mulno, pilji, su'i.

In notes:

jalge
x1 (action/event/state) is a result/outcome/conclusion of antecedent x2 (event/state/process).
jmina
x1 adds/combines x2 to/with x3, with result x4; x1 augments x2 by amount x3.
mulno
x1 (event) is complete/done/finished; x1 (object) has become whole in property x2 by standard x3.
pilji
x1 is the product/total/result of factors/multiplicands (x2 and x3) x2 multiplied by x3.
su'i
n-ary mathematical operator: plus; addition operator; [(((a + b) + c) + ...)].
vu'u
n-ary mathematical operator: minus; subtraction operator; [(((a - b) - c) - ...)].
grisumji
x1 is the sum (combined addition result) of x2 (plurality of the same type as x1)
porsumji
x1 is the sum of all the members of the number sequence x2
sujypau
p1 is a term of sum/polynomial p2=s1
delta
x1 (amount/value (li/ni) or labelled entity) is the (mutual) difference between/change in (states/realizations of/output from) general and relevant idea/object or subject of interest or function/aspect/property/topic/dependent parameter/dependent variable x2 under or due to a change in (independent) parameter/variable/index/identification/ownership/property/aspect x3 (generic name) to (later) specific state/realization/value/person/entity/meaning x4 (type and dimensions match those of x3) from (earlier) specific state/realization/value/person/entity/meaning x5 (type and dimensions match that of x3), under circumstances/conditions/with(in) scope/with caveats x6.
vujnu
x1 is the subtraction-difference of x2 and x3 (and x4 etc.); x1 = x2 - x [ - x4 etc.]
ke'u'i
accepts number (n) after: repeat last sumti up to n times
dudvota
x1 gives x2 (number) votes (upvotes) to x3
funtiio
x1 (plural of ordered pairs) is an exhaustive set (possibly infinite) of inputs/outputs defining a unary function which yields result x3 when given input x2; x1(x2) = x3