\operatorname{arcsin} (x) = x + \frac{1}{6} x^{3} + \frac{3}{40} x^{5} + \frac{5}{112} x^{7} + \frac{35}{1152} x^{9} + \frac{63}{2816} x^{11} + \frac{231}{13312} \\ \quad{}\quad{}x^{13} + \frac{143}{10240} x^{15} + \operatorname{O} \bigl(x^{16}\bigr)

`&operatorname`(arcsin)(x) = series(1*x+1/6*x^3+3/40*x^5+5/112*x^7+35/1152*x^9+63/2816*x^11+231/13312*x^13+143/10240*x^15+O(x^16),x,16)