What is expand ((3mn-27m^{3n}))/((1+3m)(1-3m)) ?

The solution to expand ((3mn-27m^{3n}))/((1+3m)(1-3m)) is (3mn-27m^{3n})/(1-9m^2)

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expand ((3mn-27m^{3n}))/((1+3m)(1-3m))

expand

\frac{( 3 mn - 27 m ^{3 n} )}{( 1 + 3 m ) ( 1 - 3 m )}

\frac{3 mn - 27 m ^{3 n}}{1 - 9 m ^{2}}

Solution steps

\frac{3 mn - 27 m ^{3 n}}{( 1 + 3 m ) ( 1 - 3 m )}

Expand

(1 + 3 m) (1 - 3 m) : 1 - 9 m^{2}

= \frac{3 mn - 27 m ^{3 n}}{1 - 9 m ^{2}}

e^{4 i x} (e^{i x} + e^{- i x})

\frac{n ^{2} + n - 1}{( 2 n + 2 ) ^{2}}

\frac{d}{d x} (\frac{( 10 x ^{2} - 7 x - 12 ) x}{( 10 z + 8 ) ( 2 x + 3 )})

3242

c u r l (y e^{x y} + x e^{x y} + cos (z))

What is expand ((3mn-27m^{3n}))/((1+3m)(1-3m)) ?
The solution to expand ((3mn-27m^{3n}))/((1+3m)(1-3m)) is (3mn-27m^{3n})/(1-9m^2)