$\sin\left(x\right)^2=1-\cos\left(x\right)$
$\left(gh\right)^0$
$\lim_{x\to0}\left(\frac{2x+sinx}{x^2+x}\right)$
$\cos\left(65.5\right)$
$-8845+771$
$a^240x^2+25x^4$
$z^2-16z+8$
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