代数式:4+5y,7,m,立方根号mn,1/y^2+1/x^2,-3a^2b,x^2-xy中,
属于整式的有：4+5y,7,m,-3a^2b,x^2-xy
属于单项式的有：7,m,-3a^2b
属于多项式的有4+5y,x^2-xy