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Show the regions that satisfy each of the following inequalities.
(a) #-4ltyle3#
(b) #4ltylt6#
(c) #(x-3)/4gt(x+5)/2#
(d)# 2/3 x- 7+1/5 xge- x/3#
(e)# x^2-4xgex(x-1)-18#
(f) #x-2ge4+3x#