$\left(x-z\right)^4$
$2x^4-4x^3-4x^2+6$
$-220+18$
$x2+x-12>0$
$\left(1-sin\:x\right)=\left(1+sin\:x\right)$
$\frac{3}{4}\:x\:-\:\frac{8}{12}$
$4x^3+8x^2+8x+16$
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