Ответ:\(4(3x-2)-7x=12x-8-7x=5x-8\).\(-3(5-a)+2a-6=-15+3a+2a-6=5a-21\).\(9y-4(2y-3)=9y-8y+12=y+12\).\(5(2m+3)-3(m-4)=10m+15-3m+12=7m+27\).