Q2:=(x-1)*(x+1)*(y-1)*(y+1);

NiM+SSNRMkc2IioqLCZJInhHRiUiIiIhIiJGKUYpLCZGKEYpRilGKUYpLCZJInlHRiVGKUYqRilGKSwmRi1GKUYpRilGKQ==

Q1:=(x+y+3)*(x+y-3)*(-x+y+3)*(-x+y-3);

NiM+SSNRMUc2IioqLChJInhHRiUiIiJJInlHRiVGKSIiJEYpRiksKEYoRilGKkYpISIkRilGKSwoRighIiJGKkYpRitGKUYpLChGKEYvRipGKUYtRilGKQ==

Q:=(x-4)*(x-1)*(x+1)*(y-1);

NiM+SSJRRzYiKiosJkkieEdGJSIiIiEiJUYpRiksJkYoRikhIiJGKUYpLCZGKEYpRilGKUYpLCZJInlHRiVGKUYsRilGKQ==

# I 16 punti di intersezione di Q1, Q2: R:={solve({Q1=0, Q2=0}, {x,y})};

NiM+SSJSRzYiPDI8JC9JInlHRiUiIiMvSSJ4R0YlISIiPCRGKy9GKSEiIzwkRisvRikhIiU8JC9GKSIiJUYrPCRGNS9GLCIiIjwkRihGODwkRjhGLzwkRjhGMjwkL0YpRi0vRixGNjwkRj4vRixGMDwkRj4vRixGMzwkRj4vRixGKjwkL0YpRjlGQTwkRkdGQzwkRkdGPzwkRkdGRQ==

S:={solve({Q1=0, Q=0}, {x,y})};

NiM+SSJTRzYiPDE8JC9JInlHRiUiIiMvSSJ4R0YlISIiPCRGKy9GKSEiIzwkRisvRikhIiU8JC9GKSIiJUYrPCRGNS9GLCIiIjwkRihGODwkRjhGLzwkRjhGMjwkL0YpRi0vRixGNjwkL0YpRjkvRixGMDwkRkEvRixGMzwkRkFGPzwkRkEvRixGKjwkRj8vRikiIig8JEY/L0YpISIo

?intersectR intersect S

Warning, inserted missing semicolon at end of statement, ...R intersect S;

NiM8LzwkL0kieUc2IiIiIy9JInhHRichIiI8JEYpL0YmISIjPCRGKS9GJiEiJTwkL0YmIiIlRik8JEYzL0YqIiIiPCRGJUY2PCRGNkYtPCRGNkYwPCQvRiZGKy9GKkY0PCQvRiZGNy9GKkYuPCRGPy9GKkYxPCRGP0Y9PCRGPy9GKkYo

S minus R

Warning, inserted missing semicolon at end of statement, S minus R;

NiM8JDwkL0kieEc2IiIiJS9JInlHRiciIig8JEYlL0YqISIo

R minus S

Warning, inserted missing semicolon at end of statement, R minus S;

NiM8JTwkL0kieUc2IiEiIi9JInhHRichIiM8JEYlL0YqISIlPCRGJS9GKiIiIw==