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4-[(x+3)*((x-2)/(x^2 +5x +6))]

4-[(x+3)(x-2)/(x^2 +5x +6))]

factorise denominator 

4-[(x+3)(x-2)/(x+3)(x+2)]

cancel down (x+3)

4-[(x-2)/(x+2)]

expand 

4(x+...

The imperfect subjunctive is a way of expressing something that could have happened, or you wished had happened in the past, or as a way of suggesting something that is unlikely to happen in the future. I...

As you know, the English language has rules that allow you to identify a question without too many problems: order of the words (auxiliary verb + subject + verb + ...) and/or presence of elements such as ...