solve , , , . , , SymPy nsolve, Python.
sympy.nsolve(n*9**5 - 10**n-1, n, 5)
, .
solve , , . . WolframAlpha . , SymPy LambertW.
, , , LambertW, solve , mpmath.lambertw. - lambdify:
s = sympy.solve(n*9**5 - 10**n-1, n)
import sympy.mpmath
lambdify([], s, [{'LambertW': lambda x: sympy.mpmath.lambertw(x, -1)}, "mpmath"])()
[mpf('5.5125649309411875')].
lambdify LambertW, -1, mpmath. "mpmath" mpmath , .