(8⁵/₉-10)+( 14¹/₆-18¹⁴/₂₇)=8⁵/₉-10 + 14¹/₆-18¹⁴/₂₇ = - 5⁴³/₅₄
1) 8⁵/₉-10 =8⁵/₉-9⁹/₉ = - 1⁴/₉
2) - 1⁴/₉ - 18¹⁴/₂₇ = - ¹³/₉ - ⁵⁰⁰/₂₇ = - ¹³ˣ³/₂₇ - ⁵⁰⁰/₂₇ = - ³⁹/₂₇ - ⁵⁰⁰/₂₇ = -⁵³⁹/₂₇
3) - ⁵³⁹/₂₇ + 14¹/₆ = - ⁵³⁹/₂₇ + ⁸⁵/₆ = - ⁵³⁹ˣ²/₅₄ + ⁸⁵ˣ⁹/₅₄ = - ¹⁰⁷⁸/₅₄ + ⁷⁶⁵/₅₄ = -³¹³/₅₄ = - 5⁴³/₅₄