$$\frac{ -25x { y }^{ 2 } { z }^{ 3 } -35 { x }^{ 4 } { 2 }^{ 2 } + { x }^{ 2 } y { 2 }^{ 4 } }{ -5 { x }^{ 2 } y2 }$$
$-\frac{16xy-140x^{3}-25y^{2}z^{3}}{5xy_{2}}$
$\frac{140x^{3}-16xy+25y^{2}z^{3}}{5xy_{2}}$
