$\int_0^{\frac{\pi}{2}}\left(2x\sin\left(x\right)\right)dx$
$25+10s+s^2$
$\cos\left(4x\right)x\cos\left(2x\right)+\sin\left(2x\right)x\sin\left(4x\right)$
$\left(x^3-13x^2+5\right)^2$
$\ln\left(2\right)+\ln\left(2x^2-5\right)=\ln\left(111\right)$
$\left(x+7\right)\left(x-13\right)$
$\left(-9\right)\:-\:\left(-14\right)$
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