多项式2mx²-x²+5x+8-(7x²-3y+5y)的值与x无关,求m²-[2m²-(5m-4)+m]d的值

多项式2mx²-x²+5x+8-(7x²-3y+5y)的值与x无关,求m²-[2m²-(5m-4)+m]d的值
多项式2mx²-x²+5x+8-(7x²-3y+5y)的值与x无关,求m²-[2m²-(5m-4)+m]d的值

多项式2mx²-x²+5x+8-(7x²-3y+5y)的值与x无关,求m²-[2m²-(5m-4)+m]d的值
题目有问题吧?