去括号的2m-{n+[4m-3(m+2n)+6m]-5m} m=3分之2 n=-4
去括号的2m-{n+[4m-3(m+2n)+6m]-5m} m=3分之2 n=-4
已知2m+n分之m-2n=3,则2m+n分之3(m-2n)+3(2m+n)分之m-2n-4(2m+n)分之5(m-2n)
2分之m+n-3分之m-n=1,3分之m+n-4分之m-n=-1
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
如果m和n互为相反数,则m+2m+3m+4m+5m+5n+4n+3n+2n+n=
如果m,n互为相反数,求m+2m+3m+4m+5m+5n+4n+3n+2n+n=多少
已知m=7分之4,n=7分之3,求[-2(m+n)(m-n)]²×(m+n)²×2分之7(m-n)
[(m-n)^2*(m-n)^3]^2/(m-n)^4
(m-n)2(n-m)3(n-m)4化简
m-{n-2m+[3m-(6m+3n)+5n]}=
(m-n)-2(m+2n)=?去括号
[2(m+n)^5-3(m+n)^4+(-m-n)^3]÷[2(m+n)^3]