$\frac{dy}{dx}+4y-e^{-x}=0,\:\:y\left(0\right)=\frac{4}{3}$
$\ln\left(2x^4+x^3+3x^2+3x\right)$
$\left(a\sin\left(x\right)-b\cos\left(x\right)\right)^2+\left(a\cos\left(x\right)+b\sin\left(x\right)\right)^2$
$-4x-x^2+3$
$\int x^2.\cos\left(x^3+3\right)dx$
$-6-3\cos^2$
$3\left(log\left(4x\right)-2log\left(x\right)\right)+log\left(x\right)$
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