<p>Find</p>
<ol class="abc-list"><li><div class="list-item-paragraph">\( \displaystyle \displaystyle\int \frac{1}{4 + 9x^2} \, \mathrm{d}x \);</div></li><li><div class="list-item-paragraph">\( \displaystyle \displaystyle\int \frac{7}{\sqrt{1 - 4x^2}} \, \mathrm{d}x \); </div></li><li><div class="list-item-paragraph">\( \displaystyle \displaystyle\int \frac{2}{x^2 + 2x + 5} \, \mathrm{d}x \).</div></li></ol>

\( \displaystyle \displaystyle \displaystyle\int \frac{1}{4 + 9x^2} \, \mathrm{d}x \);

\( \displaystyle \displaystyle \displaystyle\int \frac{7}{\sqrt{1 - 4x^2}} \, \mathrm{d}x \); 

\( \displaystyle \displaystyle \displaystyle\int \frac{2}{x^2 + 2x + 5} \, \mathrm{d}x \).

Indefinite integrals of standard forms

Indefinite integrals of standard forms