(1) `int_1^2(3x^4+2x^3+x^2+5)dx`

int_1^4 3x^2dx

Evaluate: (i) int(x^5+x^(-2)+2)/(x^2)\ dx (ii) int(5\ x^4+12\ x^3+7\ x^2)/(x^2+x)\ dx

Evaluate the definite integrals int_1^2(4x^3-5x^2+6x+9)dx

Evaluate: int(2x+1)/(x^4+2x^3+x^2-1)dx

Evaluate: int(2x+1)/(x^4+2x^3+x^2-1)dx

Evaluate : int_1^2 (5x^2)/(x^2+4x+3) dx

int1/(x^2(x^4+1)^(3/4)) dx

int1/(x^4+3x^2+9)dx

If I_(1)=int_(0)^(1) 2^(x^(2)) dx, I_(2)=int_(0)^(1) 2^(x^(3)) dx, I_(3)=int_(1)^(2) 2^(x^(2))dx and I_(4)=int_(1)^(2) 2^(x^(3))dx then

Evaluate: (i) int4\ x^3\ sqrt(5-x^2)\ dx (ii) int1/(sqrt(x)+x)\ dx