$d^2=2400$
$3\cos\left(x\right)=3-3\sin\left(x\right)$
$1=\frac{x}{2}$
$\left(4x+1\right)\left(16x^2+4x+1\right)$
$\left(7+4a\right)\left(7-9a\right)$
$tan\:\left(180\:+\:x\right)$
$\sqrt{2^{-5}}$
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