$3x^2-18x+9^2$
$\int x^2e^{3x^3-5}dx$
$\lim_{x\to5}\sqrt{\frac{x^2+10x-50}{x-4}}$
$\left(2x^2-9\right)\left(2x^2-18\right)$
$\left(2a^3b^4-c\right)^3$
$3x<4x+4$
$-7\left(2m\:+\:5\right)$
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