能帮你算出给的N次的X多项式之和，并输入相应的系数a0,a1,a2....an。式子形为：a0+a1*x+a2*x1+a3*x2+...+a(n+1)*xn=sum-Can help you figure out X to the N times and polynomials, and enter the corresponding coefficients a0, a1, a2 .... an. Formula of the form: a0+ a1* x+ a2* x1+ a3* x2+...+ a (n+1)* xn = sum