化简 2^n+4 - 2(2^n) -------------------- 分数线.2(2^n+3)化简 2^n+4 - 2(2^n)除以2(2^n+3)

化简：1/(n+1)(n+2)+1/(n+2)(n+3)+1/(n+3)(n+4) [3n(n+1)+n(n+1)(2n+1)]/6+n(n+2)化简 [3n(n+1)+n(n+1)(2n+1)]/6+n(n+2)化简 化简n分之n-1+n分之n-2+n分之n-3+.+n分之1 化简n分之n-1+n分之n-2+n分之n-3+.+n分之1 化简,1.[(m+n-p)(m+p+n)-(m+n)²]/(-p),2.[(m+n)(m-n)-(m-n)²+2n(m-n)]/4n 根号【（2n+1）/（n²+n）】平方-4/（n平方+n ）化简 化简(n+1)(n+2)(n+3) 化简：2^4n+1-(4^2n+16^n) 化简:2^4n+1-(4^2n+16^n) 化简4n^3-6n^2-2n+3 （m-n)2(n-m)3(n-m)4化简 2^n/n*(n+1) 化简[n^2+(n+1)^2]/n(n+1) 化简额 6n-2m+4n化简 lim(n+3)(4-n)/(n-1)(3-2n) lim(n^3+n)/(n^4-3n^2+1) 求最小值 ((n+2)(n+4))/(n(n+3))