p1=sum([x^(25*i) for i in range(4)]) p2=sum([x^(5*i) for i in range(16)]) show(p1) show(p2) show(expand(p1*p2))
cookies=sum([x^(2*i) for i in range(1,5)]) brownies=x^2+x^3+x^4+x^5 bread=sum([x^(i) for i in range(2,9)]) show(cookies) show(brownies) show(bread) show(expand(cookies*brownies*bread))