$\frac { x - 4 } { 2 x - 4 }$
$8^3\cdot8$
$\sqrt{4x+13}+2=1$
$\frac{\sin\left(u\right)}{\cos\left(u\right)}+\frac{\cos\left(u\right)}{\sin\left(u\right)}$
$5x^2\:-\:q\:-\:6xq^3\:+7x^2q\:+\:xq^3\:-\:2x\:+x^2q$
$\frac{2x}{\left(3x+2\right)\left(x-3\right)}-\frac{5x}{\left(3x+2\right)\left(x+4\right)}$
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