2x2n−12n−1\frac{2 x^{2 n-1}}{2 n-1}2n−12x2n−1
2x2n+12n+1\frac{2 x^{2 n}+1}{2 n+1}2n+12x2n+1
x2n2n+1\frac{x^{2 n}}{2 n+1}2n+1x2n
x2n2n−1\frac{x^{2 n}}{2 n-1}2n−1x2n