# A + B = C (加算)
[> > +>+<<<-]> > >[<<<+> > >-]<<[>+>+<<-]> > [<<+> > -]<

# A += B (加算)
>[<+> > +<-]>[<+>-]<<

# A - B = C (減算)
[> > +>+<<<-]> > >[<<<+> > >-]<<[>->+<<-]> > [<<+> > -]<

# A -= B (減算)
>[<-> > +<-]>[<+>-]<<

# A * B = C (乗算)
>[> > >+>+<<<<-]> > > > [<<<<+> > > > -]<[<<<<[> > +>+<<<-]> > >[<<<+> > >-]>-]<<

# A *= B (乗算)
[> > +<<-]>[> > +>+<<<-]> > >[<<<+> > >-]<[<[<<+> > > > +<<-]> > [<<+> > -]<-]<[-]<<

# A / B = C ... D (除算)
[> > >+>+<<<<-]> > > > [<<<<+> > > > -]> > +[<<<<<[-> > ->+<[[> > +<<-
]> > >+<<<]> > [<<+> >-]>-<<<<<]>+> > [<<<+> > >-]> > ]<<<[<->[> > +<<+
]> > >+<<<]> > >[<<<<<[> > +>+<<<-]> > >[<<<+> > >-]>[<<-> > -]>-]<<<<