public static MathObject LeadingCoefficientGpe(this MathObject u, MathObject x) =>
u.CoefficientGpe(x, u.DegreeGpe(new List <MathObject>()
{
x
}));
public static MathObject LeadingCoefficientGpe(this MathObject u, MathObject x) =>
u.CoefficientGpe(x, u.DegreeGpe(new List <MathObject>()
{
x
}));