reserve F for Field,
  x for Element of F,
  V for VectSp of F,
  v for Element of V;

theorem
  for V being add-associative right_zeroed right_complementable non
empty addLoopStr, u,v,w being Element of V holds -(v+w)=-w-v & -(w+-v)=v-w & -
  (v-w)=w+-v & -(-v-w)=w+v & u-(w+v)=u-v-w by Lm4,Lm5,RLVECT_1:27,30,33;
