[질문] 쎈수학 8가 519번부터566번까지답좀알려주세요

-1/4/4/1/5/-4분의1/5/x+3y/3/5/-8/-12분의7/1/4/4/5/x^2-4x-1/2/1/5/(1)-4x+8y-1(2)-2x+11y-3/-6/1/10/4/50xy+20x/1/1/4/4/4/2/4xy-6x+8/4/11x-8y/5/3/3/-30