In http://wiki.axiom-developer.org/axiom--test--1/src/algebra/OutformSpad supersub(a,[sub1,super1,sub2,super2,...]) is defined as:
creates a form with each subscript aligned under each superscript.
but it is not implemented as one of the specialOps in http://wiki.axiom-developer.org/axiom--test--1/src/algebra/TexSpad see for example:
op = "SUPERSUB" => ...
As a result these sub/super-scripted symbols are not displayed properly in LaTeX form:
(1) -> )set output algebra on
)set expose add constructor OutputForm
OutputForm is now explicitly exposed in frame initial
supersub(message "M",[q, paren(s)])
(s) (1) M q