$\int_{-1}^2\left(3x^2-4\right)dx=$  

(a)  

 $\int_{-1}^2\left(6-x^2\right)dx=$  

(a)  

 $\int_0^{\pi}2\sin xdx=$  

(a)  

 $\int_{-2}^4\left(8+2x-x^2\right)dx=$  

(a)  

 $\int_1^4\left(2x+\frac{3}{\sqrt{x}}\right)dx=$  

(a)  

 $\int_1^e\ \frac{2}{x}dx=$  

(a)  

 $\int_1^3\ \left(3x^2-2x+1\right)dx=$  

(a)  

 $\int_0^{\pi}\ -2\cos xdx=$  

(a)  

 $\int_{-2}^4\ \left(5x^4-3x^2-4\right)dx=$  

(a)