Write each one as an expression: 1) the sum of the squares of a and b
2) the difference of the squares of m and n
3) the square of the difference of m and n
4) twice the product of the squares of x and y
5)twice the square of the products of x and y

I know it's a lot but I really need some help right now!

Venita is sewing new curtains. the table below shows the relationship between the number of stitches in a row and the length ofthe row.sewingnumber of stitches length (cm)51 131532024306what is the relationship between the number of stitches and the length? othe number of stitches istimes the length.o. the number of stitches is 3 times the length.