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# sympy.integrals.risch.as_poly_1t

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```"""Most of these tests come from the examples in Bronstein's book."""
from sympy import (Poly, I, S, Function, log, symbols, exp, tan, sqrt,
Symbol, Lambda, sin, cos, Eq, Piecewise, factor)
from sympy.integrals.risch import (gcdex_diophantine, frac_in, as_poly_1t,
derivation, splitfactor, splitfactor_sqf, canonical_representation,
```
```def test_as_poly_1t():
assert as_poly_1t(2/t + t, t, z) in [
Poly(t + 2*z, t, z), Poly(t + 2*z, z, t)]
assert as_poly_1t(2/t + 3/t**2, t, z) in [
Poly(2*z + 3*z**2, t, z), Poly(2*z + 3*z**2, z, t)]
assert as_poly_1t(2/((exp(2) + 1)*t), t, z) in [
Poly(2/(exp(2) + 1)*z, t, z), Poly(2/(exp(2) + 1)*z, z, t)]
assert as_poly_1t(2/((exp(2) + 1)*t) + t, t, z) in [
```

```"""Most of these tests come from the examples in Bronstein's book."""
from sympy import (Poly, I, S, Function, log, symbols, exp, tan, sqrt,
Symbol, Lambda, sin, cos, Eq, Piecewise, factor)
from sympy.integrals.risch import (gcdex_diophantine, frac_in, as_poly_1t,
derivation, splitfactor, splitfactor_sqf, canonical_representation,
```
```def test_as_poly_1t():
assert as_poly_1t(2/t + t, t, z) in [
Poly(t + 2*z, t, z), Poly(t + 2*z, z, t)]
assert as_poly_1t(2/t + 3/t**2, t, z) in [
Poly(2*z + 3*z**2, t, z), Poly(2*z + 3*z**2, z, t)]
assert as_poly_1t(2/((exp(2) + 1)*t), t, z) in [
Poly(2/(exp(2) + 1)*z, t, z), Poly(2/(exp(2) + 1)*z, z, t)]
assert as_poly_1t(2/((exp(2) + 1)*t) + t, t, z) in [
```