$\lim_{x\to-\infty}\left(\frac{1}{3}\right)^{x-2}$
$\cos\left(0.45\right)^2+\sin\left(x\right)^2=1$
$\int\frac{1}{\sqrt{x^2-441}}dx$
$\left(6y^8\right)^0$
$7\tan^2\left(x\right)-21\tan\left(x\right)=0$
$3a+2b+a-3b$
$46=-4x-10$
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