若2abn+1与-am-1b2是同类项，则m+n=______，nm=______．

已知代数式2a3bn+1与-3am-2b2是同类项，则m+2n=______． 已知代数式2a3bn+1与-3am+2b2是同类项，则2m+3n=______． 若单项式3x2yn与-2xmy3是同类项，则m+n=______． 2a5bn+2与-9am+nb5是同类项．求2m-3n=______． 当m=______，n=______时，2xmy3与-3xy3n是同类项． 单项式3xm+2ny8与-2x2y3m+4n是同类项，则m+n=______． 若2003xn+7与2004x2n+3是同类项，则n=______． 已知单项式-5x3yn与5xm+1y3是同类项，则m-n的值为______． 单项式3x^m+2 y^7与-2x^4 y^2m+3n是同类项,则m+n=______ 如果2x的3m-1次方y的4次方与-3x的8次方y的2n次方是同类项,则m=___,n=______. 若单项式4xmy3与-x2yn-1的和是单项式，则m=______，n=______． 如果单项式xa+1y3与2x3yb是同类项，那么ab=______．