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Multiply. `( x^2-2 x-3)/( x^2-7 x+12) * ( x^2-x-12)/( x^2+5 x+4)`, `x!=-1,3,-4`

State the product in simplest form.

`( x^2-2 x-3)/( x^2-7 x+12) * ( x^2-x-12)/( x^2+5 x+4)=`  
 


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.