What is expand 3-(2pi)/((-1+s)^2+4pi^2) ?

The solution to expand 3-(2pi)/((-1+s)^2+4pi^2) is 3-(2pi)/(1-2s+s^2+4pi^2)

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expand 3-(2pi)/((-1+s)^2+4pi^2)

expand

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

3 - \frac{2 π}{1 - 2 s + s ^{2} + 4 π ^{2}}

Solution steps

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

Expand

(- 1 + s)^{2} + 4 π^{2} : 1 - 2 s + s^{2} + 4 π^{2}

= 3 - \frac{2 π}{s ^{2} - 2 s + 1 + 4 π ^{2}}

(- 5) \cdot 1 + (- 5) \cdot x

x \cdot 7 x^{2}

e^{x} (2 x + e^{- x})

\frac{P ( 1 - V )}{1 + P}

\frac{( x - 3 ) ( x + 1 )}{x + 2}

What is expand 3-(2pi)/((-1+s)^2+4pi^2) ?
The solution to expand 3-(2pi)/((-1+s)^2+4pi^2) is 3-(2pi)/(1-2s+s^2+4pi^2)