#log_3(4x)-log((7y)^9)#
#log_3(4)+log_3(x)-9log_3(7y)#
#log_3(4)+log_3(x)-9 (log_3(7)+log_3(y))#
#log_3(4)+log_3(x)-9log_3(7)-9log_3(y)#
#log_3(4)+log_3(x)+log_3(7^-9)-9log_3(y)#
#log_3(4 * 7^-9)+log_3(x)-9log_3(y)#
#log_3(4*1/7^9)+log_3(x)-9log_3(y)#
#log_3(4/7^9)+log_3(x)-9log_3(y)#