Seventh grade integer exponential power and its operation problems 1、x^(-2)y^(-2)÷[x^(-2)-y^(-2)] 2、[2x^(-2)+y]²-[2x^(-2)-y]² PS: ^ (- 2) is negative quadratic Please write down the whole process, thank you

Seventh grade integer exponential power and its operation problems 1、x^(-2)y^(-2)÷[x^(-2)-y^(-2)] 2、[2x^(-2)+y]²-[2x^(-2)-y]² PS: ^ (- 2) is negative quadratic Please write down the whole process, thank you

The specific process is shown in the figure