$2b^2+11b+5$
$\frac{x}{\left(\sqrt{-4x^2-8x+5}\right)}$
$-8x^2+15x+3$
$\left(x+2\right)\left(-2x+3y\right)$
$\pi+1\frac{2}{3}$
$1x^4-7x^2-18$
$sin\left(\frac{\pi}{3}+x\right)-sin\left(\frac{\pi}{3}-x\right)=sin\left(x\right)$
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