$\lim_{x\to0}\left(\frac{tan8x}{sin4x}\right)$
$-71+729$
$\cos\left(2a\right)-3\sin a+1=0$
$36x+2+9$
$\frac{dy}{dt}=\frac{sin\left(t\right)+cos\left(t\right)}{1+2y}$
$2\left(x-3\right)+5>5-x$
$8xy+x+5+x+y+xy+2$
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