public Phanso hieu2(int x)
{
Phanso t1 = new Phanso();
t1.ts = this.ts * 1 - x * this.ms;
t1.ms = this.ms * x;
return(t1.thugon());
}
public Phanso hieu(Phanso t2)
{
Phanso t = new Phanso();
t.ts = this.ts * t2.ms - this.ms * t2.ts;
t.ms = this.ms * t2.ms;
return(t.thugon());
}