$5x^3y^4+3x\cdot2x^3-4x^2+3x$
$\frac{4}{3}x+\frac{5}{3}\left(4x+30\right)=530$
$m^2+m+1$
$\left(i+5j-k^3\right)^2$
$2-4q\:$
$\:-8\:.\:12$
$\frac{x}{x^3-1}$
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