$\lim_{x\to0}\left(\frac{4-4\cos\theta}{\sin3\theta}\right)$
$\left(2a^5+4b^4\right)^3$
$y\left(x-a\right)^2=a^2x$
$x\sqrt{x}+1$
$\left(5x^2-2y^3\right)^3$
$\cot\left(a\right)+\frac{2}{\sec\left(x\right)}=0$
$-248-+729$
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