$3\left(2.1\right)-4\left(3.2\right)-2\left(-1.6\right)$
$3x-4>5x-42$
$x^2-8x=17$
$-9\:x\:25\:$
$7\sin\:\left(\frac{\pi\:}{6}x\right)=4$
$\frac{d^2}{dx^2}\left(x\cdot\cos\left(x\right)\right)b$
$2x+5>17$
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