$\sqrt{64}^7$
$\frac{cos\left(2a\right)}{cosa}-\frac{sen\left(2a\right)}{sena}=-\frac{1}{cosa}$
$\left(\csc x\right)\left(\sec x\right)-\left(\csc x\right)\left(\cos x\right)=\tan x$
$\left(1+x\right)\tan\left(y\right)\frac{dy}{dx}=x$
$7x^2-28$
$\frac{\sqrt{2\left(x+h\right)}-\sqrt{2x}}{h}$
$216-8x^{24}y^9z^3$
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