$9x^2-40x+54=6x^2-22x+27$
$\frac{\left(12^7\right)^6}{12^{30}}$
$\lim_{x\to0}\left(\frac{3x^2-5x}{7x^2+2}\right)$
$\left(3a^2b-2ab^2\right)^2$
$2y^2+12y-54$
$\frac{\cot\left(x\right)-\tan\left(x\right)}{\sin\left(x\right)-\cos\left(x\right)}$
$b^5+b^2+b$
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