$1+\sin\left(x\right)\:=\frac{\cos^2\left(x\right)}{1-\sin\left(x\right)}$
$21-8\left(v+3\right)+3+7v$
$x^2+8x=65$
$\left|x^2-6x\right|$
$\left(\frac{1}{2a}\right)^3$
$4x+\frac{3}{2}x^2-4x^2-\frac{1}{2}x+\frac{1}{2}x-\frac{1}{2}x^2$
$\left(w+x\right)^2$
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