<span>6</span>⁷<span>/</span>₁₅<span> - 2</span>³<span>/</span>₁₅<span> = 4</span>⁷⁻³<span>/</span>₁₅<span> = 4</span>⁴<span>/</span>₁₅
<span>
9</span>¹¹<span>/</span>₁₆ <span>+ 4</span>³<span>/</span>₁₆<span> - 2</span>²<span>/</span>₁₆<span> = 13</span>¹⁴<span>/</span>₁₆<span> - 2</span>²<span>/</span>₁₆<span> = 11</span>¹²<span>/</span>₁₆<span> = 11</span>³<span>/</span>₄
<span>
6</span>⁵<span>/</span>₁₄<span> - 2</span>¹¹<span>/</span>₁₄<span> = 5</span>¹⁹<span>/</span>₁₄<span> - 2</span>¹¹<span>/</span>₁₄<span> = 3</span>⁸<span>/</span>₁₄<span> = 3</span>⁴<span>/</span>₇
<span>
19</span>¹¹<span>/</span>₃₅<span> -12</span>²⁹<span>/</span>₃₅<span> = 18</span>⁴⁶<span>/</span>₃₅<span> - 12</span>²⁹<span>/</span>₃₅<span> = 6</span>⁴⁶⁻²⁹<span>/</span>₃₅ = 6¹⁷/₃₅
Если я правильно поняла пример то получится так
20/2x(54+46/2)=770 20/2x(54+46)/2=500 (20/2x54+46)/2=293 20/2x54+46/2=563
9² · 8 = 81 · 8 = 648
9² = 9 · 9 = 81