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# sympy.integrals.prde.parametric_log_deriv_heu

All Samples(4)  |  Call(2)  |  Derive(0)  |  Import(2)

```"""Most of these tests come from the examples in Bronstein's book."""
from sympy import Poly, Matrix, S, symbols, I
from sympy.integrals.risch import DifferentialExtension
from sympy.integrals.prde import (prde_normal_denom, prde_special_denom,
prde_linear_constraints, constant_system, prde_spde, prde_no_cancel_b_large,
```
```def test_parametric_log_deriv():
DE = DifferentialExtension(extension={'D': [Poly(1, x), Poly(1/x, t)]})
assert parametric_log_deriv_heu(Poly(5*t**2 + t - 6, t), Poly(2*x*t**2, t),
Poly(-1, t), Poly(x*t**2, t), DE) == \
(2, 6, t*x**5)
```

```"""Most of these tests come from the examples in Bronstein's book."""
from sympy import Poly, Matrix, S, symbols, I
from sympy.integrals.risch import DifferentialExtension
from sympy.integrals.prde import (prde_normal_denom, prde_special_denom,
prde_linear_constraints, constant_system, prde_spde, prde_no_cancel_b_large,
```
```def test_parametric_log_deriv():
DE = DifferentialExtension(extension={'D': [Poly(1, x), Poly(1/x, t)]})
assert parametric_log_deriv_heu(Poly(5*t**2 + t - 6, t), Poly(2*x*t**2, t),
Poly(-1, t), Poly(x*t**2, t), DE) == \
(2, 6, t*x**5)
```