Step-by-step explanation:
If you need help with how I got my answer, you can ask me.
[tex] \frac{2yx {}^{ - 4} }{(x {}^{ - 4}y {}^{4}) {}^{3} \times 2x {}^{ - 1}y {}^{ - 3} } [/tex]
[tex] \frac{2yx {}^{ - 4} }{x {}^{ - 12}y {}^{12} \times 2x {}^{ - 1}y {}^{ - 3} } [/tex]
[tex] \frac{2y x {}^{ - 4} }{2x {}^{ - 13} y {}^{ - 9} } [/tex]
[tex] = x {}^{9} y {}^{ - 8} [/tex]
[tex] = \frac{x {}^{9} }{y {}^{8} } [/tex]
12.
[tex]( \frac{2u {}^{ 4} }{ - u {}^{2}v {}^{ - 1} \times 2uv {}^{ - 4} } ) {}^{ - 1} [/tex]
[tex]( \frac{2u {}^{4} \times 1 }{ - 2 {u}^{3}v {}^{ - 5} } ) {}^{ - 1} [/tex]
[tex]( - u v {}^{ 5} ) {}^{ - 1} [/tex]
[tex] = - u {}^{ - 1} v {}^{ - 5} = - \frac{ 1}{uv {}^{5} } [/tex]
13.
[tex] - \frac{2m {}^{4}n {}^{ - 1} }{( - m {}^{2}n {}^{ - 2}) {}^{ - 1} \times - nm {}^{ - 3} } [/tex]
[tex] - \frac{2m {}^{4}n {}^{ - 1} }{ - m {}^{ - 2} n {}^{2} \times - nm {}^{ - 3} } [/tex]
[tex] - \frac{2m {}^{4} n {}^{ - 1} }{m {}^{ - 5}n {}^{3} } = - 2m {}^{9} n {}^{ - 4} [/tex]
[tex] = - \frac{2m {}^{9} }{n {}^{4} } [/tex]
14.
[tex]( \frac{x {}^{3}y {}^{ - 4} }{ - {x}^{2} y {}^{ - 3} \times yx {}^{0} } ) {}^{3} [/tex]
[tex]( \frac{x {}^{3}y {}^{ - 4} }{ - {x}^{ - 2}y {}^{ - 2} } ) {}^{3} [/tex]
[tex]( - {x}^{5} y {}^{ - 2} ) {}^{3} = - x {}^{15} y {}^{ - 6} [/tex]
[tex] - \frac{x {}^{15} }{ {y}^{6} } [/tex]
15.
[tex] - \frac{yx {}^{4} \times - {y}^{3} z { }^{ - 4} }{(z {y}^{2} ) {}^{4} } [/tex]
[tex] - \frac{ - y {}^{4} x {}^{4} z {}^{ - 4} }{ {z}^{4} y {}^{8} } = - y {}^{4} x {}^{4} z {}^{ - 8} = - \frac{(xy) {}^{4} }{ {z}^{8} } [/tex]
16.
[tex] \frac{h {}^{7}j {k}^{4} }{4h {}^{4} } = \frac{1}{4} h {}^{3} = \frac{h {}^{3} jk {}^{4} }{4} [/tex]
