N 3 4 n 7 July 8, 2019 16 32 64 128 63 n 4 3 2n 6 * 7 n 5 7 n 2 )+ 8 3 n 4 )- 2 7n 1 )( n 3 )- 7n n 4 N 3 4 n 5 7 5 14 N-3 5 + and-4 7 = 6-2n-1 35 N − 3 ≤ 4 n 7 3 4 n 7 8 4n 3 n 71 5n 4n 3 n 7 N 1 2 n 2 3 n 4 7 N 4 n 3 6n 2 7n 21 N 4 6 /( n 3 7 7.5 n 4 n 3 2n 9 N 4 2n 3 2n 2 n 7