Question

1) 2xy² when x=5 and y= -5
2) 5z² over 8 when z= -3
3) -3z⁰=?
4) (-6y²)(2y³)=?
5) (-4xyz⁴)²=?

I am working on a math assignment all over these questions are related to 1 main question please answer all, thank you so much