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Jan 3, 2018 at 3:56 comment added Aaron Meyerowitz Good point! The numerator didn't work either. The denominator of the second fraction was intended to be (and now is) $(x+3)(x+4).$ Thanks.
Jan 3, 2018 at 3:53 history edited Aaron Meyerowitz CC BY-SA 3.0
edited body
Jan 2, 2018 at 22:54 comment added Vladimir Dotsenko How did $x+4$ appear in the denominator of the second displayed formula?!
Jan 2, 2018 at 21:56 history edited Aaron Meyerowitz CC BY-SA 3.0
added 196 characters in body
Jan 2, 2018 at 21:37 history answered Aaron Meyerowitz CC BY-SA 3.0