Problems
Multiplying polynomials
Multiplying polynomials
We introduce a symbolic form of two polynomials in \textbf{x} with integer coefficients. Output of the product in descending order of degrees - also in a symbolic form.
The degree of initial polynomials are not over \textbf{10}, the coefficients of initial polynomials modulo no more than \textbf{10^4}.
\InputFile
The two lines are polynomials.
\OutputFile
In a single line shows a polynomial.
Input example #1
0 0
Output example #1
0
Input example #2
x+1 x-1
Output example #2
x^2-1