`int_(-a)^(a)(x^(2)+sqrt(a^(2)-x^(2)))dx`

int(x)/(sqrt(a^(2)-x^(2)))dx

int(x^(2))/(sqrt(a^(2)+x^(2)))dx

int_(0)^(a)sqrt(a^(2)-x^(2))dx=

Integrate int_(0)^(2)x^(3)sqrt(2x-x^(2))dx

int (sqrt(a^(2)-x^(2))+(x^(2))/(sqrt(a^(2)-x^(2))))dx

int(x^(4)-1)/(x^(2)sqrt(x^(2)+x^(2)+1))dx=sqrt(x^(2)+(1)/(x^(2))+1)+C(sqrt(x^(2)+x^(2)+1))/(x^(2))+C(sqrt(x^(4)+x^(2)+1))/(x)+C(d) none of these

int(x)/(2-x^(2)+sqrt(2-x^(2)))dx

int_(0)^(2)(x^(2))/(sqrt(2)-x)dx

int_(0)^(2)(x^(2))/(sqrt(2)-x)dx