(1-2²)×﹙1-3²﹚×…×(1-201²﹚
=(1+2)(1-2)(1+3)(1-3).(1+201)(1-201)
=(-1)*(-2)(-3).(-200)*3*4*5*.*202
=101*201*(200!)²
=20301×(200!)²
(1-2²)×﹙1-3²﹚×…×(1-201²﹚
=(1+2)(1-2)(1+3)(1-3).(1+201)(1-201)
=(-1)*(-2)(-3).(-200)*3*4*5*.*202
=101*201*(200!)²
=20301×(200!)²