elidable terminator: end mathematical (mex) forethought (Polish) expression; often elidable.

- kuspe
- x
_{1}ranges/extends/spans/persists/reaches across/over interval/gap/area/scope/extent/range x_{2}.

- du'a'e
*(exp!)* - mekso n-ary ordered operator: structure creator/ordered tuple, 'endow'; the structure formed by underlying set X
_{1}(as) endowed with element, order, quoted operator, etc. X_{2}, X_{3}, ... - fa'ai
*(exp!)* - mathematical ordered n-ary operator: (pointwise) functional left composition; X
_{1 \circ X}. - sau'i
*(exp!)* - mekso n-ary operator: reciprocal of the sum of the reciprocal of each of X
_{1}, X_{2}, ..., X_{n}(for any natural number n); 1/((1/X_{1) + (1/X}.