$x^2+6x-34$
$\left(1-x\cdot y\right)^3$
$sin\left(x-30\right)=-0.3$
$\sqrt[4]{12w^2}\cdot\sqrt[4]{8w^6}$
$\left(a^4+a\cdot b^3-a^3b-b^4\right)\cdot2\cdot\left(a^2+b^2\right)$
$2\cos^2\left(x\right)-7\cos\left(x\right)-4=0$
$\lim_{x\to\infty}\left(\frac{x-|x|}{2x}\right)$
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