Evaluation of Definite Integrals

If $y=x^{\underset{1}{\overset{x}{\int }}\ln tdt}$, then the value of $\frac{dy}{dx}$ at $x=e$ is

$I={\int }_0^{\pi }\frac{x^{2 }\sin 2x\sin \left(\frac{\pi }{2}\cos x\right)}{2x-\pi } dx$

A cubic $f\left(x\right)$ vanishes at $x=-2$ & has relative minimum/maximum at $x=-1, x=\frac{1}{3}$.
Find $\underset{-1}{\overset{1}{\int }}f\left(x\right)dx$ , if coefficient of $x^3=1$ in $f\left(x\right).$

If ${\int }_{\frac{\pi }{4}}^{\frac{\pi }{3}}\frac{\left({\sin }^3\theta -{\cos }^3\theta -{\cos }^2\theta \right){\left(\sin \theta +\cos \theta +{\cos }^2\theta \right)}^{2007}}{{\left(\sin \theta \right)}^{2009}{\left(\cos \theta \right)}^{2009}}d\theta$$=\frac{{\left(a+\sqrt{b}\right)}^d-{\left(1+\sqrt{c}\right)}^d}{d}$, where $a, b, c$  and $d$ are all positive integers. Then the value of $(a+b+c+d)$ is

The value of : $\underset{0}{\overset{2}{\int }}\sqrt{4-x^2}dx$ would be:

The value of ${\int }_1^{e^{37}}\frac{\mathrm{\pi sin}\left(\mathrm{\pi }\ell nx\right)}{x}dx$ is

The value of  ${\int }_1^{e^{37}}\frac{\pi \sin \left(\pi \ln x\right)}{x}dx$  is:

Let $f$ be a non-negative function defined on the interval $\left[0,1\right].$ If  $\underset{0}{\overset{x}{\int }}\sqrt{1-{(f\text{'}(t\left)\right)}^2}dt=\underset{0}{\overset{x}{\int }}f\left(t\right)dt,0\le x\le 1,$  and  $f(0)=0,$  then:

The value of the integral ${\displaystyle \underset{0}{\overset{1}{\int }}\sqrt{\frac{\mathrm{}\mathrm{}\mathrm{}\mathrm{}\mathrm{}\mathrm{}\mathrm{}\mathrm{}1-x}{1+x}}dx}$ is

The value of the integral $\underset{0}{\overset{1}{\int }}\sqrt{\frac{\mathrm{}\mathrm{}\mathrm{}\mathrm{}\mathrm{}\mathrm{}\mathrm{}\mathrm{}1-x}{1+x}}dx$ is

Let  $f\left(x\right)=x-\left[x\right],$  for every real number $x,$ where $\left[x\right]$ is the integral part of $x.$ Then  $\underset{-1}{\overset{1}{\int }}f\left(x\right)dx$ is:

If $f\left(x\right)=Asin\left(\frac{\pi x}{2}\right)+B, f\text{'}\left(\frac{1}{2}\right)=\sqrt{2} \mathrm{and}\underset{0}{\overset{1}{\int }}f\left(x\right)dx=\frac{2A}{\pi },$ then constants $A$ and $B$ are respectively 

$f\left(x\right)=A\sin \left(\frac{\pi x}{2}\right)+B, f^{\text{'}}\left(\frac{1}{2}\right)=\sqrt{2}$and${\int }_0^{1}f\left(x\right)dx=\frac{2A}{\mathrm{\pi }}$, then constants $A$ and $B$ are

The value of $\underset{0}{\overset{\pi /4}{\int }}\frac{\sin x+\cos x}{9+16\sin 2x}dx$ is

${\int }_0^{\frac{2}{3}} \frac{dx}{\sqrt{4-9x^2}}=$

The value of $\frac{e^{-{\displaystyle \frac{\pi }{4}}}+{\int }_0^{{\displaystyle \frac{\pi }{4}}}{e}^{-x}\tan { }^{50}xdx}{{\int }_0^{{\displaystyle \frac{\pi }{4}}}{e}^{-x}({\tan }^{49}x+{\tan }^{51}x)dx}$ 

${\int }_0^{\infty }\frac{6}{e^{3x}+6e^{2x}+11e^x+6}dx=$

The value of the integral ${\int }_{-{\log }_{e}2}^{{\log }_{e}2}{e}^x\left({\log }_e\left(e^x+\sqrt{1+e^{2x}}\right)\right)dx$ is equal to

Let $5f\left(x\right)+4f\left(\frac{1}{x}\right)=\frac{1}{x}+3, x>0.$ Then $18{\int }_1^{2}f\left(x\right)dx$ is equal to