[(9/2:4/5-4,9:1/2,8):7,75]⁸²*2⁸⁰
=[(9/2*5/4-49/10:14/5):31/4]⁸²*2⁸⁰
=[(45/8-49/10*5/14):31/4]⁸²*2⁸⁰
=[(45/8-245/140)31/4]⁸²*2⁸⁰
=[(1575/280-490/280):31/4]⁸²*2⁸⁰
=[1085/280*4/31]⁸²*2⁸⁰
=[4340/8360]⁸²*2⁸⁰
=[1/2]⁸²*2⁸⁰
=2^-1+82*2⁸⁰
=2^-82*2⁸⁰
=2^-82+80
=2^-2
=4
