`int_0^2int_0^x int_0^y x y dx dy dz`

int_0^2int_0^(x^2)e^(y/x)dydx

int_0^1 int_1^2 (x^2+y^2) dx dy

int_0^[x] dx

int_0^1 (x+x^2)dx

int_0^2 int_0^sqrt(4+x^2) (dx dy)/(4+x^2+y^2) =

int_0^1 int_y^sqrt(y) (x^2+y^2) dy dx=

int_(0)^(a) y^(2) dy

int_0^1 int_0^sqrt(1+x^2) (dy dx)/(1+x^2+y^2)

int_0^(2a)f(x)dx is equal to 2int_0^af(x)dx b. 0 c. int_0^af(x)dx+int_0^af(2a-x)dx d. int_0^af(x)dx+int_0^(2a)f(2a-x)dx