Descomposición de una fracción
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1/(1 + exp(x)) - 1/(1 + exp(x))^2
$$\frac{1}{e^{x} + 1} - \frac{1}{\left(e^{x} + 1\right)^{2}}$$
1 1
------ - ---------
x 2
1 + e / x\
\1 + e /
Simplificación general
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1
----------
2/x\
4*cosh |-|
\2/
$$\frac{1}{4 \cosh^{2}{\left(\frac{x}{2} \right)}}$$
x
e
---------------
x 2*x
1 + 2*e + e
$$\frac{e^{x}}{e^{2 x} + 2 e^{x} + 1}$$
exp(x)/(1 + 2*exp(x) + exp(2*x))
Parte trigonométrica
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cosh(x) + sinh(x)
------------------------
2
(1 + cosh(x) + sinh(x))
$$\frac{\sinh{\left(x \right)} + \cosh{\left(x \right)}}{\left(\sinh{\left(x \right)} + \cosh{\left(x \right)} + 1\right)^{2}}$$
(cosh(x) + sinh(x))/(1 + cosh(x) + sinh(x))^2