Express using positive exponents and, if possible, simplify. z^-4/6x^2 =
z ^ - 4 = 1 / z ^ 4
z ^ - 4 / 6 x ^ 2 =
( 1 / z ^ 4 ) / 6 x ^ 2 =
1 / z ^ 4 * 6 x ^ 2 =
1 / [ 6 ( z ^ 4 * x ^ 2 ) =
1 / [ 6 ( z ^ 2 * x ) ^ 2 ]
z ^ - 4 / 6 x ^ 2 =
( 1 / z ^ 4 ) / 6 x ^ 2 =
1 / z ^ 4 * 6 x ^ 2 =
1 / [ 6 ( z ^ 4 * x ^ 2 ) =
1 / [ 6 ( z ^ 2 * x ) ^ 2 ]