$\frac{2x^3-5x^2-1}{x^2-4x+5}$
$40a^3+0.5-22a^3+4.12$
$3x+1y+1y+1x+1y+2x+1y$
$3m^2+4m+1+m^2+3m+1-5m^2+8m+6$
$\int\:\frac{q^2}{\sqrt{4q-q^2}}dq$
$\frac{dx}{dy}=\pi$
$9x^4-16$
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