$\left(arctan\left(\frac{y}{x}\right)=\ln\left(x\right)+\ln\left(c\right)\right)$
$-1^2-5-1$
$2 + 5 - ( 1 - 5 ) - 2 + ( 2 + 3 )$
$23y+27y+-31y$
$\left(5\cdot5\cdot5\right)^3$
$2x^3-7x^3$
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