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Bonsoir Qui veut bien m'aider svp

Simplifier les expressions suivantes :
A = e^-3x+5 × e^(x+2)³ / e^ -2x-6
B ={ e^3x+e^-3x} / 2 × (e^3x+e^-3x) /2
C = 2 (2e^2x + e^-2x) - (e^x+e^-x)² - (e^x-e^-x)²
D = (e^-x)² × (e^3x)³
E = e^x × e^-x+2
F = e^1/2 / e^1/3
G = e^3.6 / e^2.7
H =e^2 × e^-1.4


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