$5x+4=59$
$x^2-30x+225=441$
$-2340+-8760$
$0.328+21.66+1.879+421.7$
$x^4+x^3-12x^2$
$\lim_{x\to0}\left(\frac{cosx}{xtanx}\right)$
$\int\frac{\left(x+7\right)}{\left(sqrt\left(16-x^2\right)\right)}dx$
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