$7+\left|10-\left(5-\left(6+4\right)\right)\right|-\left|15+\left(4-3\right)+\left(18-2\right)\right|-29$
$\frac{\cot\left(x\right)+1}{\cos\left(x\right)+\sin\left(x\right)}=\csc\left(x\right)$
$-2-\left(-39\right)$
$\int ln\left(\frac{x-7}{x+7}\right)xdx$
$y+1>0$
$\left(\:x-2\:\right)\left(\:x+2\right)\left(x^2+4\right)\:-\:x^4$
$\frac{49}{\left(-7\right)}$
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