Вы ввели
Integral((5*x + 3)/sqrt(3 - x^2), (x, 0, 1))
1 / | | 5*x + 3 | ----------- dx | ________ | / 2 | \/ 3 - x | / 0
$$\int_{0}^{1} \frac{5 x + 3}{\sqrt{- x^{2} + 3}}\, dx$$