[tex]( - {12x}^{4} {y}^{7} ) \div ( {3x}^{3} {y}^{6} ) = \frac{ {12x}^{4} {y}^{4} }{ {3x}^{3} {y}^{6} } [/tex]
[tex] - \frac{ 4x}{ {y}^{2} } [/tex]
