!set exolist  =!char 1 to -2 of acoscos,acossin,atantan,compderiv,comprange,acosfrac,acoscoslin,
!set titlelist=!char 1 to -2 of arccos(cos),arccos(sin),arctg(tg),Composed differentiability,Composed range,Definition domain (Arcsin; Arcos),Linear arccos(cos),
!set exototal =!itemcnt $exolist

