What is expand (21)/((3-7x)^4) ?

The solution to expand (21)/((3-7x)^4) is (21)/(81-756x+2646x^2-4116x^3+2401x^4)

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expand (21)/((3-7x)^4)

expand

\frac{21}{( 3 - 7 x ) ^{4}}

\frac{21}{81 - 756 x + 2646 x ^{2} - 4116 x ^{3} + 2401 x ^{4}}

Solution steps

\frac{21}{( 3 - 7 x ) ^{4}}

(3 - 7 x)^{4} = 81 - 756 x + 2646 x^{2} - 4116 x^{3} + 2401 x^{4}

= \frac{21}{81 - 756 x + 2646 x ^{2} - 4116 x ^{3} + 2401 x ^{4}}

\frac{2 ( 76 + 21701 )}{245}

1 + \frac{12}{( 0.4 s + 1 ) s ( s + 1 )}

\frac{( x + 3 ) ( x - 3 ) ( 4 x + 1 )}{( x + 4 )}

(1 + 5 t)^{4} e^{2 + 2 t}

\frac{( 3 ql + 2 p ) l}{16}

What is expand (21)/((3-7x)^4) ?
The solution to expand (21)/((3-7x)^4) is (21)/(81-756x+2646x^2-4116x^3+2401x^4)