$\frac{dy}{dt}=t^2-\frac{y}{2t}$
$\tan b+cot\:b\:+2\:csc\:2\:b$
$7\left(z+5\right)$
$b x^{12}-\frac{49b^2}{36}$
$-18\cdot15$
$n^2+8n+15$
$-2x^2-7x+4$
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