求帮忙把以下几个数学公式写出具体计算步骤
求解(a-1/2)^2(a^2+1/4)^2(a+1/2)^2=a^8-1/8a^4+1/256
(-3/4X^6Y^3+6/5X^3Y^4-9/10XY^5)除以3/5XY^3=-5/4X^5+2X^2Y-3/2Y^2
X^M-1/2X^m+1-1/5X^m+X^m+1-2X^m+1=4/5X^m-3/2X^m+1
我发现现在这辅导书真精简啊~