int_(-alpha)^( a)(dx)/((x^(2)+a^(2))^(3/2))

int_(-a)^(a)(dx)/((x^(2)+a^(2))^((3)/(2)))

int_(-a)^(a)(dx)/((x^(2)+a^(2))^((3)/(2)))

Find int_(-a)^(a) x^(2) (a^(2)-x^(2))^(3//2)dx

int_(2)^(3)(dx)/(x^(2)-x)=

int_(2)^(3)(dx)/(x^(2)-x)=

int_(-2)^(0)(2x+3)dx

find int_(2)^(3)(dx)/(2x)

int_(2)^(3)((dx)/(x^(2)))

int_(2)^(3)(dx)/(x^(2)-1)

If (pi)/(2)ltalphalt(2pi)/(3)andl=int_(0)^(sin2alpha)(dx)/(sqrt(4cos^(2)alpha-x^(2))) , then the value of (l+alpha)/(pi) must be__________.