$\log x-\log5=\log2-\log\left(x-3\right)$
$\log_{2x}\left(4x^2\right)=2$
$\frac{-3x+1}{\left(x+1\right)^2}$
$\cos\left(t+v\right)$
$5t^3-15t^2-45t-31990$
$\sin\left(x-\frac{\pi}{4}\right)=-0.94$
$x^3-18x^2+80x-75$
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