21 3 5 7 July 8, 2019 16 32 64 128 3 5 21 7x 21 5 умножить 3 7 2 3 5 7 21 3 8 21 5 7 21 3 7 5 x 3 1 3 5 7 21 3 7 5 21 as a fraction 8x 3 5 7x 21 21 7 4 3 5 3 70 5 21 72 3 21 5 21 5 n 3 )+ 7n 5 √ 21 3 √ 7 21 3 7 2 x 5 5 akar 21 3 akar 7