[(2x+7yhg-(2xygh))+7+2x-5y]=
[(2x+7yhg-(2xygh))+7+2x-5y]=
[(2x+7yhg-(2xygh))+7+2x-5y]=[(2x+7yhg-2xygh)+7+2x-5y]=2x+7yhg-2xygh+7+2x-5y=-2xygh+7yhg+4x-5y+7
[(2x+7yhg-(2xygh))+7+2x-5y]= [(2x+7yhg-2xygh)+7+2x-5y]= [2x+7yhg-2xygh+7 +2x-5y]=2x+7yhg-2xygh+7 +2x-5y=-2xygh+7yhg+4x-5y+7