We have seen this failed case ``` using SymEngine @vars x expr = (2*x+3*x^2)/(3*x+4*x^2) series(expr, x, 0, 1) ``` This gives zoo, but it obviously should be 2/3+(1/9)*x.
We have seen this failed case
This gives zoo, but it obviously should be 2/3+(1/9)*x.