u'=(2x-5)+2(x-5)=4x-15
F'=1/(2x-1)^2*[2(2x-1)-2(2x+1)]=-4/(2x-1)^2
y'=1+1/2sqrt(x)
y=(x-25)+sqrt(x) y'=1+1/2sqrt(x)
f'=(3(5x+3)-(3x+5)*5)/(5x+3)^2=-16/(5x+3)^2
y=(x^2-1)+6x^4 y'=2x-1+24x^3
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u'=(2x-5)+2(x-5)=4x-15
F'=1/(2x-1)^2*[2(2x-1)-2(2x+1)]=-4/(2x-1)^2
y'=1+1/2sqrt(x)
y=(x-25)+sqrt(x) y'=1+1/2sqrt(x)
f'=(3(5x+3)-(3x+5)*5)/(5x+3)^2=-16/(5x+3)^2
y=(x^2-1)+6x^4 y'=2x-1+24x^3
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