[tex]\bf -\left( \cfrac{1}{4}\cdot \cfrac{1}{4}\cdot \cfrac{1}{4}\cdot \cfrac{1}{4} \right)\implies -\left( \cfrac{1\cdot 1\cdot 1\cdot 1}{4\cdot 4\cdot 4\cdot 4} \right)\implies -\left( \cfrac{1^4}{4^4} \right)\implies -\cfrac{1^4}{4^4}[/tex]
