Ответ:\(364+a+136=a+(364+136)=a+500\).\(67-(47+b)=(67-47)-b=20-b\).\(c-149-251=c-(149+251)=c-400\).\((n+251)-30=n+(251-30)=n+221\).\(98+(m-38)=(98-38)+m=60+m\).