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= - 1 i 7/8 + ( 1 i 3/12 - 2 i 4/12) * 6/5 =
= - 1 i 7/8 + ( 15/12 - 28/12) * 6/5=
= - 1 i 7/8 + ( - 13/12) * 6/5=
= - 1 i 7/8 + (- 13/2) * 1/5=
= - 1 i 7/8 + ( - 13/10)=
= - 1 i 7/8 - 13/10=
= - 1 i 7/8 - 1 i 3/10=
= - 1 i 35/40 - 1 i 12/40=
= - 2 i 47/40=
= - 3 i 7/40