คุณ JamesCoe#18 รบกวนตรวจทีครับ
$1. ln|\sqrt{2}sinx|+c$
$2. \frac{1}{3}(cot3x+cosec3x)+c$
$3. \frac{tan4x}{4}+x+\frac{1}{2}ln|sec4x-tan4x|+c$
$4. \frac{sin^27x}{14}+c$
$5. \frac{1}{2}ln\frac{1}{\sqrt{1-e^{2x}}}+c$
$6. 4ln\frac{2}{\sqrt{4-x^2}}-\frac{x^2}{2}+c$
$7. \frac{2\sqrt{x}}{1+x}+c$
$8. x^2-6x+\frac{1}{2}ln|\frac{x}{2}|+c$
$9. \frac{1}{4}(\frac{3}{8}ln|\frac{2x-1}{2x+3}|-ln|2x+3|)+c$
$10. arctanx\cdot(1+x^2)-x+c$
$11. x^2+x+\frac{1}{3}ln|\frac{x-1}{x+2}|+c$
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