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જો સંકલન $\int_{-\frac{\pi}{2}}^{\frac{\pi}{2}}\left(\frac{x^2 \cos x}{1+\pi^x}+\frac{1+\sin ^2 x}{1+e^{\sin x^{323}}}\right) d x=\frac{\pi}{4}(\pi+a)-2$ નું મૂલ્ય હોય,તો $a$ નું મૂલ્ય શોધો.

ધારો કે $g_i: \left[\frac{\pi}{8}, \frac{3\pi}{8}\right] \rightarrow \mathbb{R}, i=1, 2$,અને $f: \left[\frac{\pi}{8}, \frac{3\pi}{8}\right] \rightarrow \mathbb{R}$ એવા વિધેયો છે કે જેથી $g_1(x)=1, g_2(x)=|4x-\pi|$ અને $f(x)=\sin^2 x$,દરેક $x \in \left[\frac{\pi}{8}, \frac{3\pi}{8}\right]$ માટે.
$S_i = \int_{\frac{\pi}{8}}^{\frac{3\pi}{8}} f(x) \cdot g_i(x) dx, i=1, 2$ વ્યાખ્યાયિત કરો.
$(1)$ $\frac{16S_1}{\pi}$ નું મૂલ્ય.
$(2)$ $\frac{48S_2}{\pi^2}$ નું મૂલ્ય.

$\int_{2}^{4} \frac{\log(x^2)}{\log(x^2) + \log(36 - 12x + x^2)} \, dx = $

$\int_{-1}^{1} \log(x + \sqrt{x^2 + 1}) \, dx = $

$\int_{0}^{\frac{\pi}{2}} \frac{\sin ^{4} x}{\sin ^{4} x+\cos ^{4} x} d x$ ની કિંમત શોધો.

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