$\left(-3\right)\cdot\left(-2\right)>-3\cdot2\cdot\left(-1\right)$
$95\cdot75$
$28-a^2-11a$
$\lim_{x\to0}\left(\frac{1-cos2x}{sin4x}\right)$
$\frac{y}{x}dx+\frac{x}{y}dy=0$
$8x-6=42$
$x^3+3x^2-64x-192$
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