若(2x-3)^5=a0+a1x+a2x^2+a3x^3+a4x^4+a5x^5,则a1+2a2+3a3+4a4+5a5=?若(1+2x)^4=a0+a1x+a2x^2+a3x^3+a4x^4,则a1-2a2+3a3-4a4=?
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