$\lim_{x\to\infty}\left(\frac{4x^2-5}{5x^3+3x^2}\right)$
$2log\:\left(x+3\right)=0$
$7x+7y$
$\cos\left(x\right)=055$
$\left(5w^2+6\right)\left(5w^2-6\right)$
$\frac{-cos^2x+1}{-sina}$
$\sqrt{x+4}=3$
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