Input: `series(exp(x))`
Compute: $$series(exp(x))$$
Result: $$1+x+\frac{1}{2}\ x^{2}+\frac{1}{6}\ x^{3}$$
LaTeX:1+x+\frac{1}{2}\ x^{2}+\frac{1}{6}\ x^{3}
$$series(exp(x)) == 1+x+\frac{1}{2}\ x^{2}+\frac{1}{6}\ x^{3}$$