Am nevoie de ajutor :(

(25/480-11/40×16/33+15/80:3/5):[0,4(5)×90-1]=
(5/96-1/3×2/5+3/16×5/3):[(45-4)/90-1]=
(5/96-2/15+⁶5/16):(41/90-1)=
[(5+30)/96-2/15]:(-49/90)=
(35/96-2/15)×(-90/49)=
-37/160×90/49=-333/784≈-0,42