General simplification
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tan(y) tan(y)
2*tan(x) + ---------- - ----------
tan(x + y) tan(x - y)
$$2 \tan{\left(x \right)} + \frac{\tan{\left(y \right)}}{\tan{\left(x + y \right)}} - \frac{\tan{\left(y \right)}}{\tan{\left(x - y \right)}}$$
2*tan(x) + tan(y)/tan(x + y) - tan(y)/tan(x - y)
tan(y)*tan(x + y) - tan(y)*tan(x - y)
2*tan(x) - -------------------------------------
tan(x + y)*tan(x - y)
$$- \frac{- \tan{\left(y \right)} \tan{\left(x - y \right)} + \tan{\left(y \right)} \tan{\left(x + y \right)}}{\tan{\left(x - y \right)} \tan{\left(x + y \right)}} + 2 \tan{\left(x \right)}$$
2*tan(x) - (tan(y)*tan(x + y) - tan(y)*tan(x - y))/(tan(x + y)*tan(x - y))
2*tan(x) + tan(y)/tan(x + y) - tan(y)/tan(x - y)
2*tan(x) + tan(y)/tan(x + y) - tan(y)/tan(x - y)
Combining rational expressions
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(2*tan(x)*tan(x + y) + tan(y))*tan(x - y) - tan(y)*tan(x + y)
-------------------------------------------------------------
tan(x + y)*tan(x - y)
$$\frac{\left(2 \tan{\left(x \right)} \tan{\left(x + y \right)} + \tan{\left(y \right)}\right) \tan{\left(x - y \right)} - \tan{\left(y \right)} \tan{\left(x + y \right)}}{\tan{\left(x - y \right)} \tan{\left(x + y \right)}}$$
((2*tan(x)*tan(x + y) + tan(y))*tan(x - y) - tan(y)*tan(x + y))/(tan(x + y)*tan(x - y))
Rational denominator
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(2*tan(x)*tan(x + y) + tan(y))*tan(x - y) - tan(y)*tan(x + y)
-------------------------------------------------------------
tan(x + y)*tan(x - y)
$$\frac{\left(2 \tan{\left(x \right)} \tan{\left(x + y \right)} + \tan{\left(y \right)}\right) \tan{\left(x - y \right)} - \tan{\left(y \right)} \tan{\left(x + y \right)}}{\tan{\left(x - y \right)} \tan{\left(x + y \right)}}$$
((2*tan(x)*tan(x + y) + tan(y))*tan(x - y) - tan(y)*tan(x + y))/(tan(x + y)*tan(x - y))
/ I*x -I*x\ / I*y -I*y\ / I*(x + y) I*(-x - y)\ / I*y -I*y\ / I*(x - y) I*(y - x)\
2*I*\- e + e / \- e + e /*\e + e / \- e + e /*\e + e /
-------------------- + ------------------------------------------- - ------------------------------------------
I*x -I*x / I*(x + y) I*(-x - y)\ / I*y -I*y\ / I*(x - y) I*(y - x)\ / I*y -I*y\
e + e \- e + e /*\e + e / \- e + e /*\e + e /
$$\frac{2 i \left(- e^{i x} + e^{- i x}\right)}{e^{i x} + e^{- i x}} - \frac{\left(- e^{i y} + e^{- i y}\right) \left(e^{i \left(- x + y\right)} + e^{i \left(x - y\right)}\right)}{\left(e^{i y} + e^{- i y}\right) \left(e^{i \left(- x + y\right)} - e^{i \left(x - y\right)}\right)} + \frac{\left(- e^{i y} + e^{- i y}\right) \left(e^{i \left(- x - y\right)} + e^{i \left(x + y\right)}\right)}{\left(e^{i y} + e^{- i y}\right) \left(e^{i \left(- x - y\right)} - e^{i \left(x + y\right)}\right)}$$
tan(y) tan(y)
2*tan(x) + ---------- - ----------
tan(x + y) tan(x - y)
$$2 \tan{\left(x \right)} + \frac{\tan{\left(y \right)}}{\tan{\left(x + y \right)}} - \frac{\tan{\left(y \right)}}{\tan{\left(x - y \right)}}$$
2*tan(x) + tan(y)/tan(x + y) - tan(y)/tan(x - y)
tan(y)*tan(x - y) - tan(y)*tan(x + y) + 2*tan(x)*tan(x + y)*tan(x - y)
----------------------------------------------------------------------
tan(x + y)*tan(x - y)
$$\frac{2 \tan{\left(x \right)} \tan{\left(x - y \right)} \tan{\left(x + y \right)} + \tan{\left(y \right)} \tan{\left(x - y \right)} - \tan{\left(y \right)} \tan{\left(x + y \right)}}{\tan{\left(x - y \right)} \tan{\left(x + y \right)}}$$
(tan(y)*tan(x - y) - tan(y)*tan(x + y) + 2*tan(x)*tan(x + y)*tan(x - y))/(tan(x + y)*tan(x - y))
2 2
tan(y) tan(y) tan (y)*tan(x) tan (y)*tan(x)
2*tan(x) + --------------- - ---------------- - ---------------- - ---------------
tan(x) + tan(y) -tan(y) + tan(x) -tan(y) + tan(x) tan(x) + tan(y)
$$2 \tan{\left(x \right)} - \frac{\tan{\left(x \right)} \tan^{2}{\left(y \right)}}{\tan{\left(x \right)} + \tan{\left(y \right)}} + \frac{\tan{\left(y \right)}}{\tan{\left(x \right)} + \tan{\left(y \right)}} - \frac{\tan{\left(x \right)} \tan^{2}{\left(y \right)}}{\tan{\left(x \right)} - \tan{\left(y \right)}} - \frac{\tan{\left(y \right)}}{\tan{\left(x \right)} - \tan{\left(y \right)}}$$
2*tan(x) + tan(y)/(tan(x) + tan(y)) - tan(y)/(-tan(y) + tan(x)) - tan(y)^2*tan(x)/(-tan(y) + tan(x)) - tan(y)^2*tan(x)/(tan(x) + tan(y))
Assemble expression
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tan(y) tan(y)
2*tan(x) + ---------- - ----------
tan(x + y) tan(x - y)
$$2 \tan{\left(x \right)} + \frac{\tan{\left(y \right)}}{\tan{\left(x + y \right)}} - \frac{\tan{\left(y \right)}}{\tan{\left(x - y \right)}}$$
2*tan(x) + tan(y)/tan(x + y) - tan(y)/tan(x - y)