$3\cdot\sin^2\left(x\right)-4\sin\left(x\right)-4=0$
$x+x+2v$
$4-2a+4a+5-7-3a$
$\sqrt{48}.\sqrt{72}$
$-24=-2\left(k+18\right)$
$16x^4+24x^2y+9y^2$
$\lim_{x\to8}\left(49\right)$
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