一元多项式的计算，(1)输入并建立多项式；

(2)输出多项式；

(3)两个多项式相加，建立并输出和多项式；如：(x+10)+(2x+5)=3x+15

(4)两个多项式相减，建立并输出差多项式。如：(x+10)-(2x+5)=-x+5

-One yuan polynomial calculation, (1) the input and the establishment of a polynomial　(2) polynomial output　(3) two polynomial sum, create and output and polynomials　such as: (x+10)+ (2x+5) = 3x+15 (4) two polynomials subtraction, and outputs the differential polynomial. For such as: (x+10)- (2x+5) =-x+5