!set exolist  =!char 1 to -2 of deriv1,dersec,derdir,approxlin,derpart,derpart2,champscalaire,
!set titlelist=!char 1 to -2 of Composition I; partial derivatives,Composition II Partial derivatives,Directionnal derivatives,Linear approximation,Partial derivatives 1,Partial derivatives 2,Scalar Field 2D,
!set exototal =!itemcnt $exolist

