$0=x^3\left(x^2-10x+25\right)$
$80-45x^2$
$14-\left(+3\right).2+7.\left(-11\right)$
$\lim_{x\to0}\frac{\left(\ln\left(\sin\left(x\right)\right)\right)}{\left(\ln\left(\tan\left(x\right)\right)\right)}$
$3x-8\ge11x+16$
$4abc+b^2+\frac{abc}{2}-ac^2$
$a^2+4a-4$
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