$\frac{\cos\left(x\right)^2.\csc\left(-x\right)}{\cot\left(-x\right)}$
$4x+1\ge9$
$83.7+10.60$
$2x+3y+7y-5x+11x-12y+3$
$6\left(4\right)\left(2\right)+-5\left(2\right)\left(-5\right)+-12\left(-3\right)$
$\left(x+9\right)\left(7x-4\right)$
$\ln\left(y\right)=\frac{x}{-2}$
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