Definite Integration · Mathematics · NDA

What is $\int^{1}_{-1}(3\sin x-\sin 3x)\cos^2 xdx$ equal to?

Let $p=\int_a^b f(x) d x$ and $q=\int_a^b|f(x)| d x$. If $f(x)=e^{-x}$, then which one of the following is correct ?

What is $\int^{\pi/2}_0 \frac{a+\sin x}{2a+\sin x+\cos x} dx$ equal to?

What is $\int\limits_{-1}^{0} h(x) dx$ equal to?

What is $\int_{0}^{2} h(x) dx$ equal to?

What is $8\int_1^2 f(x)dx$ equal to?

What is $\displaystyle \int_0^\pi\left(\sin ^4 x+\cos ^4 x\right) d x$ equal to?

What is I equal to?

What is $\displaystyle \rm \int_0^{8 \pi}|\sin x| d x$ equal to?

‘What is the value of Q ? 

What is the value of R ? 

What is the value of $\frac{I_1+I_2}{I_1-I_2} $ ?

What is the value of $8 I_1^2$

What is the value of I2 ?

What is l equal to when a < 0 < b ? 

What is l equal to when a < b < 0 ?