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Multiply. `( x^2+8 x+15)/( x^2+7 x+10) * ( x^2-4)/( x^2+7 x+12)`, `x!=-3,-5,-4`

State the product in simplest form.

`( x^2+8 x+15)/( x^2+7 x+10) * ( x^2-4)/( x^2+7 x+12)=`  
 


Enter the numerator and denominator separately in the boxes above. If the denominator is 1, enter the number 1. Do not leave either box blank.