$\lim_{n\to\infty}\sqrt{n^2-2}-\sqrt{n^2+n}$
$c+502=975$
$-13tan\left(x\right)-13=0$
$cos\left(2x\right)=\sin\left(\frac{-1\pi}{2}+x\right)$
$\left(z+0.6\right)\left(z+0.3\right)$
$10^2.4^3$
$\left(2y+2x^2y^{\frac{3}{2}}\right)dx+\left(x^3y^{\frac{1}{2}}+2x\right)dy=0$
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