$7-3\cdot4$
$\frac{1}{x}-\frac{x+2}{2x}+1$
$894.56+99.99+49.99+5.905+34.5$
$9\left(3n-5\right)$
$3x^2+2y^2+z^2-6x-8y+2z-6=0$
$\lim_{x\to0}\left(\frac{8x-4\pi}{\cos\left(2\pi-x\right)}\right)$
$\left(x^2-\frac{1}{2}\right)^3$
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