$4u+6-3$
$x^2+88x=100$
$49x^2-2x+4$
$a^2b^2\left(2a^2b^2-2a^2b\right)$
$\lim_{x\to h}\:\frac{\tan7x-\sin5x}{\sin2x}$
$\frac{225}{144}a^4-\frac{25}{49}b^2$
$\left(y+8\right)\left(y-3\right)$
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