Data:L11n440/Multivariable Alexander

$-t_{2}t_{1}^{3}+t_{4}t_{1}^{3}+2t_{2}t_{3}t_{1}^{2}-t_{3}t_{1}^{2}+t_{2}t_{4}t_{1}^{2}-t_{2}t_{3}t_{4}t_{1}^{2}-2t_{4}t_{1}^{2}+t_{1}^{2}-2t_{2}t_{3}t_{1}+t_{3}t_{1}-t_{2}t_{4}t_{1}+t_{2}t_{3}t_{4}t_{1}+2t_{4}t_{1}-t_{1}+t_{2}t_{3}-t_{3}t_{4}$