I want to ask Maths

..-(11/4-[2/7-(3/4+2/7-47/11)+8/11]) <=====是不是有括號
=-(11/4-[2/7-(231/308+88/308-1316/308)+8/11])
=-(11/4-[2/7-(-997/308)+8/11])
=-(11/4-[2/7+997/308+8/11])
=-(11/4-[88/308+997/308+224/308])
=-(11/4-[1309/308])
=-(847/308-1309/308)
=-(-462/308)
=3/2 <=====答案
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