Question

{ 3 - 1/3 × ( 3 - 1/3 - 1/6 - 1/9 ) × 9/43 - [ 1 + 15/9 ] } × 36/289 = ?

Answer 1

[3 - 1/3*(54/18-6/18-3/18-2/18)*9/43-24/9]*36/289=
=(3-1/3*43/18*9/43-8/3)*(6/17)^2=
=(3-1/6-8/3)*(6/17)^2=
=(18/6-1/6-16/6)*(6/17)^2=
=1/6*6^2/17^2=
=6/17^2=
=6/289