$+483-24+46$
$r^4+2r^2=0$
$4x-2y+8=0$
$2y-2yx-3y^2$
$\frac{2\sin\left(x\right)+\sin\left(2x\right)}{2\sin\left(x\right)-\sin\left(2x\right)}=1$
$3\left(2\right)^2+-2\left(2\right)^3+3\left(1\right)+2\left(1\right)-300$
$x^2+12>0$
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