Answer :

Sweetyy2
  7*11*13+13=1014
7*6*5*4*3*2*1+15=5055

Abhinanda
7*11*13+13         = 13*(7*11+1)
7*6*5*4*3*2*1+15 = 15*(7*6*4*2+1)
The product of one composite no: to any other no: is always composite. 
So, both of the above no;s are composite.

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