$$\int\frac{arctg^{2}x}{1+x^{2}}dx; \int \sin^{3}x\ \cos^{4}xdx$$
$\frac{\left(\arctan(x)\right)^{3}}{3}+С,\ \frac{\left(\cos(x)\right)^{7}}{7}-\frac{\left(\cos(x)\right)^{5}}{5}+С_{1}$
