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Se non la vivi, non verr脿 mai fuori dal tuo strumento.
Stai male....(LuLLI)
y(x) = e^-A(x)鈭玡^A(x) f(x) dx + c
y'' 鈭� 4y' + 5y = e^2x(1 + cos x) + 5x^2.
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