5*n - 1 7*n - 8 8*n + 7 ------- - ------- - ------- 20*n 20*n 20*n
(5*n - 1*1)/((20*n)) - (7*n - 1*8)/(20*n) - (8*n + 7)/(20*n)
0.05*(-1.0 + 5.0*n)/n - 0.05*(7.0 + 8.0*n)/n - 0.05*(-8.0 + 7.0*n)/n
0.05*(-1.0 + 5.0*n)/n - 0.05*(7.0 + 8.0*n)/n - 0.05*(-8.0 + 7.0*n)/n
7 2*n 1 n 2 7*n - -- - --- - -- + - - - --- 20 5 20 4 5 20 ---------- + -------- + ------- n n n
(-7/20 - 2*n/5)/n + (-1/20 + n/4)/n + (2/5 - 7*n/20)/n