$\sin\left(90+x\right)+\cos\left(180+x\right)\sin\left(-x\right)^2$
$\frac{dy}{dx}=\frac{x^5}{\left(4+x^6\right)}y$
$12^9\cdot12^{-7}$
$y=\left(2x-3\right)\left(4x-5\right)$
$\lim_{x\to\infty}\left(x-\left(\left(x\right)\cdot e^{-\frac{1}{x}}\right)+e^{-\frac{1}{x}}\right)$
$y^2+5y+4$
$\log\left(\log\left(x\right)\right)=1$
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