!set exolist  =!char 1 to -2 of varTrinome,nbdergraph,deriverComp,deriverPoly,deriverProduit,deriverQuotient,
!set titlelist=!char 1 to -2 of Investigate a Function,Tangent and derivative,The derivative of a combined function,The derivative of a polynomial,The product rule,The quotient rule,
!set exototal =!itemcnt $exolist

