[math]1/5+3xx(7/3-7/4)-3/20-5/13xx(8+5)/8[/math]
[math]1/5+3xx(28-21)/12-3/20-5/13xx13/8[/math]
[math]1/5+3xx7/12-3/20-5/8[/math]
[math]1/5+21/12-3/20-5/8[/math]
[math](24+210-18-75)/120[/math]
[math]141/120[/math]
[math]47/40[/math]