$3x^2-8x-8=0$
$\int\frac{2x-1}{\left(x+1\right)^2\left(x-2\right)}dx$
$\sqrt{\frac{x-4}{x^4+5}}$
$\frac{8r^6s^7}{5rs^7}\:$
$ab+ac+ad$
$\frac{12x^5}{4x^7}$
$-15.a^7+6.a^7$
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