$\sin\left(x\right)\cdot\cot\left(x\right)=-\frac{1}{10}$
$\frac{1}{81}x^2-4>0$
$q^2+7q$
$2\cdot\left(x+8\right)<7\cdot\left(x+8\right)$
$25a^2+49b^4-4a^2$
$\left(2ab-4c\right)\left(2ab+3\right)$
$x^2-17x-60\ge0$
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