Програмата от
линка по-горе е страхотна
Въведи
\frac{1}{x + 1} и ще получиш $\rightarrow$ $\int \frac{1}{x + 1}\, dx = \text{ln}{\ \left (x + 1 \right )} + \mathrm{const}$
\frac{1}{x^2+4} и ще получиш $\rightarrow$ $\int \frac{1}{x^{2} + 4}\, dx = \frac{1}{2} \operatorname{arctg}{\left (\frac{x}{2} \right )} + \mathrm{const}$
$\int \frac{1}{x^{2} - 9}\, dx = \frac{1}{6} \text{ln}{\ \left (x - 3 \right )} - \frac{1}{6} \text{ln}{\ \left (x + 3 \right )} + \mathrm{const}$
$\int \frac{1}{\sqrt{2- x^2}}\, dx = \operatorname{arcsin}{\left (\frac{\sqrt{2} x}{2} \right )} + \mathrm{const}$