NEW: maths: added "-div" (issue #520)
NEW: maths: added "-div" (issue #520)

Former-commit-id: eb814dace5728bd02e7f2836c662ae586e1fec4e [formerly 71d2d0ef771150b18efb089b61cf4b6f7b9604a1]
Former-commit-id: 3a3a6cd51337be5959a57e165fa013edbae664b7
Former-commit-id: 4e8a775941d93c3e5e7fdb3b1342a02a2a468532
neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox,neuropoly/spinalcordtoolbox