Răspuns:
539/270
Explicație pas cu pas:
( ¹⁰⁾7/9+⁹⁾17/10-⁵⁾1/18)-(²⁾13/27-³⁾1/18) =
= (10·7+9·17-5·1)/90 - (2·13-3)/54 =
= (70+153-5)/90 - (26-3)/54 =
= ³⁾218/90 - ⁵⁾23/54 =
= (218·3 - 23·5)/270 =
= (654-115)/270 =
= 539/270 = 1 intreg si 269/270 = 1,9(962)