$8\cdot10^{-3}-4\cdot10^{-6}$
$10x-10-6\left(x+2\right)$
$-1=\tan^2\left(x\right)-sec^2\left(x\right)$
$a^2+b^2=145$
$\frac{d}{dx}6x^2-7$
$7x^2-5x+4$
$6x^4-8x^35^2$
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