Вычислите:3/5+3/7+9/7*4/15(7/9-1/6):2/9 *21/22

Вычислим значение выражения 3/5 + 3/7 + 9/7 * 4/15 * (7/9 - 1/6) : 2/9 *  21/22. 

3/5 + 3/7 + 3/7 * 4/5 * (14/18 - 3/18) : 2/9 *  21/22; 

3/5 + 3/7 + 3/7 * 4/5 * 11/18 : 2/9 *  21/22;  

3/5 + 3/7 + 3/7 * 2/5 * 11/9 : 2/9 *  21/22;  

3/5 + 3/7 + 3/7 * 22/45 : 2/9 *  21/22;  

3/5 + 3/7 + 3/7 * 22/45  * 9/2 *  21/22;  

3/5 + 3/7 + 3/7 * 11/5  * 1/1 *  21/22;  

3/5 + 3/7 + 3/7 * 1/5 * 21/2; 

3/5 + 3/7 + (3 * 21)/(7 * 5 * 2); 

3/5 + 3/7 + (3 * 9)/(5 * 2);  

3/5 + 3/7 + 27/10 = (3 * 14 + 3 * 10 + 27 * 7)/70 = (30 + 12 + 30 + 140 + 49)/70 = (72 + 140 + 49)/70 = 261/70.