$\frac{\:1\:+\:cot\left(a\right)}{csc\left(a\right)}\:$
$x^2+9x-1462=0$
$\sqrt{\left(32.15-144.16\right)^2+\left(0.02-21.92\right)^2\:}$
$sin\left(\frac{\pi}{6}+x\right)=\frac{1}{2}\left(cos\:x+\sqrt{3}sinx\right)$
$\cos\left(2a\right)=\sin\left(2a\right)$
$\left(-2\cdot\left(-4\right)\right)^2$
$-2.1+8.7$
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