p = m/n,
m = 1,
n = 3! = 1*2*3 = 6.
p = 1/6
-1,6n^{9}*a^{2}*(-1,1n^{5}*a^{4}) = 1.76 * n^{14} * a^{6}
1) X - 0.3X = 0.7X