Input:
toseries(sin(x))
Write:
`toseries(sin(x))`
Output: $$ convert \ to \ series :\\ \ sin(x) == \sum _{k=0}^\infty \frac {{(-1)}^{k}}{(1+2\ k)!}\ ({x}^{1+2\ k}) $$ Result:$$\sum _{k=0}^\infty \frac {{(-1)}^{k}}{(1+2\ k)!}\ ({x}^{1+2\ k})$$
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