已知x/5=y/3,则(x/x+y)+(y/x-y)-(yxy/xxx-yxy)
问题描述：
已知x/5=y/3,则(x/x+y)+(y/x-y)-(yxy/xxx-yxy)
答
y=3x/5
原式=x/(x+3x/5)+(3x/5)/[x-3x/5]-(9x^3/25)/(x^3-9x^3/25)
=8/3-3/2-9/16
=29/48