$x2-8x+16\:\:\ge0$
$-\left(a^2b^2\right)^2-\left(ab\right)^2-1$
$8a-4b-16c-12d$
$2a^3-8^2b+8b^2$
$4x^2-12x=0$
$\frac{\left(1-cos\left(x\right)\right)}{1+cos\:\left(x\right)}=\frac{1}{1-cot\left(x\right)}$
$43,236\cdot3,8$
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