Simplify exactly:

 cos⁡(111∘)cos⁡(24∘)−sin⁡(111∘)sin⁡(24∘)=cos⁡(\displaystyle {\cos{{\left({111}^{\circ}\right)}}}{\cos{{\left({24}^{\circ}\right)}}}-{\sin{{\left({111}^{\circ}\right)}}}{\sin{{\left({24}^{\circ}\right)}}}={\cos{{(}}})=\displaystyle {)}=  

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