Calcular as integrais usando as substituições indicadas: $$ \begin{array}{ll} \int_{0}^{4} \frac{d x}{1+\sqrt{x}} & x=t^{2} \\ \int_{3}^{29} \frac{(x-2)^{2 / 3} d x}{(x-2)^{2 / 3}+3} & x-2=z^{3} \\ \int_{0}^{\ln 2} \sqrt{e^{x}-1} d x & e^{x}-1=z^{2} \\ \int_{0}^{\pi} \frac{d t}{3+2 \cos t} & \tan \left(\frac{t}{2}\right)=z \\ \int_{0}^{\pi / 2} \frac{d x}{1+a^{2} \operatorname{sen}^{2} x} & \tan x=t \end{array} $$

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