3 5 7 9 11 13 15 17 19
x x x x x x x x x
x + -- + --- + ---- + ------ + -------- + ---------- + ------------- + --------------- + ------------------
6 120 5040 362880 39916800 6227020800 1307674368000 355687428096000 121645100408832000
$$\frac{x^{19}}{121645100408832000} + \frac{x^{17}}{355687428096000} + \frac{x^{15}}{1307674368000} + \frac{x^{13}}{6227020800} + \frac{x^{11}}{39916800} + \frac{x^{9}}{362880} + \frac{x^{7}}{5040} + \frac{x^{5}}{120} + \frac{x^{3}}{6} + x$$
x + x^3/6 + x^5/120 + x^7/5040 + x^9/362880 + x^11/39916800 + x^13/6227020800 + x^15/1307674368000 + x^17/355687428096000 + x^19/121645100408832000