1/2+1/4+1/6+1/32+1/72=

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1/2+1/4+1/6+1/32+1/72=1/2+1/4+1/6+1/32+1/72=1/2+1/4+1/6+1/32+1/72==144/288+72/288+48/288+9/288+4/288

1/2+1/4+1/6+1/32+1/72=
1/2+1/4+1/6+1/32+1/72=

1/2+1/4+1/6+1/32+1/72=
=144/288 + 72/288 + 48/288 + 9/288 + 4/288
=277/288

1 1\\2 1\\6 1\\12=1\\20 1\\30 1\\42 1\\56 1\\72=17/9 1-1\\2-1\\4-1\\8-1\\16-1\\32-1\\64-1\\128=1/128 17/9; 1/128