$\lim_{x\to0}\left(x.\ln\left(x^2\right)\right)$
$\left(1.5+3.2u\right)\left(2.5+3.2u\right)$
$2xyz\:y-2xyz$
$\int\frac{\left(4t^4-3t^3-2t^2+6t+5\right)}{t^2-4}dt$
$-4x\:+2-7\:+\:5x$
$\left(a^{11}+b^2\right)\left(a^{11}-b^2\right)$
$\frac{x^5}{x^9}$
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