27/34*(5-14/5*10/9)=
27/34 * (5 - 14/5 * 10/9) = 27/34 * (5 - 28/9) = 27*5/34 - 27/34 * 28/9 = 135/34 - 42/17 = (135 - 42*2)/34 = 51/34 = 3/2