$36^{x-2}=6^{4x}$
$-15+13\cdot\left(6+\left(20\right)\right)+\left(-12\right)\cdot\left(-6\right)+\left(\left(15\cdot\left(-8\right)-20\right):\left(-4\right)\right)$
$14x+23=14x-23$
$2x^2-16x+31$
$3+99+99$
$5a-7a+3a$
$x^2-7x+44>0$
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