(1 9/26*3 1/5+1 2/3-9: 2 2/5): (17 7/12-6 1/3) большое за )

(1 9/26*3 1/5+1 2/3-9:2 2/5):(17 7/12-6 1/3)
(27/130+2/3-9/2*2/5):(119/12-2)
(27/130+2/3-9*1/5):95/12
(27/130+2/3-9/5)-95/12
(-361/390)-95/12
-361/390*12/95
-19/65*2/5
-13/325