1.\(\int_0^{\dfrac{\pi}{4}}\dfrac{\sin2x}{\sqrt{1+\cos^4x}}dx\)

2.\(\int_0^{ln3}\dfrac{e^x}{\sqrt{e^x+1}+1}dx\)

3.\(\int_1^2\dfrac{3x+1}{\sqrt{x^2+3x+9}}dx\)

4.\(\int\limits^{\dfrac{\pi}{3}}_{-\dfrac{\pi}{3}}\sin x\sqrt{3+\cos^6x}dx\)

1.\(\int\dfrac{\sin2x}{\cos^4x-4}dx\)

2.\(\int\sqrt{1-x^2}dx\)

3.\(\int\dfrac{xdx}{\sqrt{1+x^4}}dx\)

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