1 вариант
if (y<=x*x) and (y>=2-x) or (y<=x*x) and (y<=2-x) and (y>= x)
2 вариант
if (y<=x*x) and ( (y>=2-x) or ( (y<=2-x) and (y>=x)) )
if (y<=x*x) and (y>=2-x) or (y<=x*x) and (y<=2-x) and (y>= x)
2 вариант
if (y<=x*x) and ( (y>=2-x) or ( (y<=2-x) and (y>=x)) )