Question

（-1）×2×（-3）×···×(-49)×50×(-2的5次方） ---------- 2×4×6····×100

Answer 1

（-1）×2×（-3）×···×(-49)×50×(-2^5）=(-1)^25*50!*(-2^5)=(32)*50!

2×4×6····×100=2*1*2*2.......*2*50=(2^50)*50!