14x50-6x {170-3x[50+(246-6x16):30+15x13]:25}=
700-6x {170-3x[50+(246-96):30+195]:25}=
700-6x [170-3x(50+150:30+195):25]=
700-6x [170-3x(50+5+195):25]=
700-6x [170-3x(55+195):25]=
700-6x (170-3x250:25)=
700-6x (170-750:25)=
700-6x (170-30)=
700-6x 140 =
700 - 840 =
- 140
