What is expand (sin(z))/((z^2-25)(z^2+9)) ?

The solution to expand (sin(z))/((z^2-25)(z^2+9)) is (sin(z))/(z^4-16z^2-225)

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expand (sin(z))/((z^2-25)(z^2+9))

expand

\frac{sin ( z )}{( z ^{2} - 25 ) ( z ^{2} + 9 )}

\frac{sin ( z )}{z ^{4} - 16 z ^{2} - 225}

Solution steps

\frac{sin ( z )}{( z ^{2} - 25 ) ( z ^{2} + 9 )}

Expand

(z^{2} - 25) (z^{2} + 9) : z^{4} - 16 z^{2} - 225

= \frac{sin ( z )}{z ^{4} - 16 z ^{2} - 225}

\frac{c N ( k - N )}{k + a N}

(6 x - 24 y) (\frac{4}{5})

\frac{( a + b ) ^{2}}{a - b}

\frac{d ^{2}}{d x ^{2}} ((y) (2 x^{3} - 4 x^{2} + 7 x - 5))

\frac{d ^{2}}{d x ^{2}} ((y) (a cos (2 x) + b sin (2 x)))

What is expand (sin(z))/((z^2-25)(z^2+9)) ?
The solution to expand (sin(z))/((z^2-25)(z^2+9)) is (sin(z))/(z^4-16z^2-225)