在算式旁的括号内注明下列运算过程中使用的运算律
(-3/2)(+5/4)(-7/6)(-4/3)(+6/5)
=[(-3/2)(-4/3)][(+5/4)(+6/5)](-7/6) ( )
=2×3/2×(-7/6) ( )
=3×(-7/6) ( )
=-7/2 ( )