$\left(b+13\right)^2$
$6x^2-60x+36=0$
$-30+8\left(-5\right)+1-5-\left(-3\right)+\left(-3\right)+\left(-7\right)$
$12x-5=31+3x$
$9,05+63,78+529,382+5,8$
$\lim_{x\to0}\sqrt{1+\sin^2x^2}-\cos^3x^2$
$\frac{-3x}{5}-\frac{1}{4}\leq\frac{2}{7}$
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