$\left(2\:a\:-\:c\right)^2\:-\:\left(a\:+\:c\right)^2$
$8+2+3+4+1+10$
$2\cos\left(x\right)=\sin\left(x\right)\cos\left(x\right)$
$\frac{4x^3-6x^2+8x-3}{x-4}$
$\left(8a^2+3a-4\right)\cdot\left(3a-8\right)$
$12a^{-5}b^0$
$\lim_{x\to2}\left(3x-5\right)$
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