Find the value of
37+-2+-65+-8
=37+-2+-37+-28+-8=-2-28-8=-30-8=-38
Hence -38 is the correct answer
-7+-8+-90
Let [k] denotes the greatest integer less than or equal to k. Then the number of positive integral solutions of the equation [x[π2]]=⎡⎢ ⎢⎣x[1112]⎤⎥ ⎥⎦ is