2^5-5*2^4+10*2^3-10*2^2+5*2(2+x)^5=2^5+5*2^4*x+10*2^3*x^2+10*2^2*x^3+5*2*x^4+x^5令x=-11=2^5-5*2^4+10*2^3-10*2^2+5*2-1故2^5-5*2^4+10*2^3-10*2^2+5*2=2
