$\lim_{x\to0}\left(-\frac{x}{8}\right)$
$-4sin\left(x\right)cos\left(x\right)+cot\left(x\right)\cdot\:\left(cos\left(x\right)^2-sin\left(x\right)^2\right)-cot\left(x\right)$
$\left(2n+8\right)\left(2n+7\right)$
$x^2-mx+4=0$
$1x^2+4x+2$
$\sin\left(x\right)=1.86$
$\left(\sqrt[3]{t}+1\right)\left(\sqrt[3]{t^2}+9\sqrt[3]{t}-8\right)$
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