Solve. Evaluate help please?

Can someone work out all the problems so I see how its done ! X=2 Y=3 Z=1. 1.x^2y= 2.y^2-x^2= 3.x^3y^2+xz= 4.3(x^2+y)=. 5.2y^2-z2=. 6.5x^2-2y=