What is expand (2cos(z))/((z-3)^3) ?

The solution to expand (2cos(z))/((z-3)^3) is (2cos(z))/(z^3-9z^2+27z-27)

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expand (2cos(z))/((z-3)^3)

expand

\frac{2 cos ( z )}{( z - 3 ) ^{3}}

\frac{2 cos ( z )}{z ^{3} - 9 z ^{2} + 27 z - 27}

Solution steps

\frac{2 cos ( z )}{( z - 3 ) ^{3}}

(z - 3)^{3} = z^{3} - 9 z^{2} + 27 z - 27

= \frac{2 cos ( z )}{z ^{3} - 9 z ^{2} + 27 z - 27}

\frac{x}{( 1 + 4 x ) ^{2}}

(sinh (x) + cosh (x))^{4}

\frac{1}{( s + 4 ) ^{2}}

\frac{s + 3}{s ( s + 2 ) ( s + 1 )}

7 (2 - 1)

What is expand (2cos(z))/((z-3)^3) ?
The solution to expand (2cos(z))/((z-3)^3) is (2cos(z))/(z^3-9z^2+27z-27)