$3x-7=-2x-2$
$\lim_{x\to1}\left(x^a-1\right)$
$45c^2+23c+12$
$\frac{x-2}{2x+4}+\frac{2}{x^2+5x+6}=\frac{5}{x+3}$
$x^2-9x-10=30$
$12ac-36ab+60ad$
$\sqrt{x+5}=4$
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