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Multiply. `( x^2-9 x+20)/( x^2-7 x+12) * ( x^2-2 x-3)/( x^2-7 x+10)`, `x!=5,4,2`

State the product in simplest form.

`( x^2-9 x+20)/( x^2-7 x+12) * ( x^2-2 x-3)/( x^2-7 x+10)=`  
 


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.