2 q 10 − 5 q 9 + 7 q 8 − 10 q 7 + 10 q 6 − 9 q 5 + 8 q 4 − 4 q 3 + 2 q 2 {\displaystyle 2q^{10}-5q^{9}+7q^{8}-10q^{7}+10q^{6}-9q^{5}+8q^{4}-4q^{3}+2q^{2}}