求几道初一数学因式分解题目解答
1.4x^2-y^2-2y-14
2.(x^2-xy)/(xy-y^2)-(y^2+xy)/(x^2+xy)+(x^2+y^2)/xy
3.(x-2)/x^2/(1-2/x)
4.(x-1)/(x^2+3x+2)-6/(x^2-x-2)-(x-10)/(x^2-4)
5.100^2-99^2+98^2-97^2+...+2^2-1^2