$\log\left(5-3x\right)=\log\left(4x-9\right)$
$\left(x+9\right)\left(x+1\right)$
$7y-8^3$
$\frac{1+\frac{1}{\cos^2\left(x\right)}}{\:1+\frac{\sin\left(x\right)^2}{\cos\left(x\right)^2}}$
$\left(\frac{1}{2}+\sqrt{a}\right)^4$
$2x^4+x^2-4x-1-4^4-2x$
$\left(x\:-\:12\right)\:-\:15\left(2x\:+\:1\right)\:<\:15$
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