2x-y的次方+2的3x+2y的次方=2的x次方÷2的y次方+（2的x次方）³×（2的y次方）²=a/b+a³b²
2^x=a2^y=b2^(x-y)+2^(3x+2y)=2^x÷2^y+(2^x)^3(2^y)^2=a/b+a³b²=(a+a³b³)/b 祝学习进步，望采纳~~
2的x-y的次方+2的3x+2y的次方=2^x÷2^y+（2^x)³(2^y)²=a/b+a³b²
