[tex]\begin{gathered} Total\text{ cubbies=}\frac{B\text{ookshelf^^b4s Area}}{\text{ cubby^^b4s }Area\text{ }} \\ B\text{ookshelf^^b4s Area= height *width} \\ B\text{ookshelf^^b4s Area =\lparen x}^2-8x-65\text{\rparen\lparen x}^2+6x+5\text{\rparen} \\ Cubby´s\text{ area= height *width} \\ Cubby´s\text{ area= \lparen x+1\rparen\lparen x}-13\text{\rparen} \\ Hence \\ Total\text{ cubb}\imaginaryI\text{es=}\frac{(x^2-8x-65)(x^2+6x+5)}{(x+1)(x-13)} \end{gathered}[/tex]
