cmaci gismu

x1 is a mathematics of type/describing x2.

See also mekso.

In notes:

mekso
x1 [quantifier/expression] is a mathematical expression interpreted under rules/convention x2.
caltaicmaci
cm1 is a geometry describing cm2=ca1=t1 geometric object.
cibjgacmaci
c1 is trigonometry of triangle j1.
cneparbi
x1 is the derivative of x2 with respect to x3.