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• 9 If the derivative of a function is zero, is the function a constant function?
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• 8 Solve $10x^4-7x^2(x^2+x+1)+(x^2+x+1)^2=0$
• 8 How to integrate ${x^3}/(x^2+1)^{3/2}$?
• 7 How do I integrate $\frac{1}{(\sin x + \cos x)^{4}}$?
• 7 Integration with a constant "a": $ \int_0^a \frac1{\sqrt {a^2-x^2}} dx $
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