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src/s/y/sympy-polys-HEAD/sympy/integrals/tests/test_risch.py   sympy-polys(Download)
from sympy import Rational, sqrt, symbols, sin, exp, log, sinh, cosh, cos, pi, \
    I, S, erf, tan, asin, asinh, acos, acosh, Function, Derivative, diff, simplify
from sympy.integrals.risch import heurisch, components
from sympy.utilities.pytest import XFAIL, skip
 
x, y, z = symbols('xyz')
f = Function('f')
 
def test_components():
    assert components(x*y, x) == set([x])
def test_components():
    assert components(x*y, x) == set([x])
    assert components(1/(x+y), x) == set([x])
    assert components(sin(x), x) == set([sin(x), x])
    assert components(sin(x)*sqrt(log(x)), x) == \