化简|1-m|√m²-4m+4
已知m>4,化简|m-4|+|7-2m|+|m×m-2m+1|-|m×m-2m-3|
化简(m*m-2m)/(4-m*m)
m²-4m+4/m²-1÷m-2/m+1+2/m-1,其中m=2
已知m>4,化简:|m-4|+|7-2m|+|m^2-2m+1|-|m^2-2m-3|
化简,:3(m-1)^2+(m+2)(m^2-2m+4)-m(m^2+3m-3)
计算2m+6/m²-4m+4·1/m+3·(m-2)(m+3)/m+3
化简求值(m+2/m²-2m)-(m-1/m²-4m+4)÷(m-1/m) 其中m=4
化简.下题2m²-[6m-﹙2m-1﹚]-3﹙m²-m-4﹚
4m²-4m+1/m+1÷4m²-1/m²-1
解:“(m-2/m+2+4m/m²-4)÷1/4-m²
若m²+m-1=0,则m^4+m³-m²+2012
化简m²-4/2m+m²