$y^2-11y$
$3+5+6+3+1$
$729^{20}-289^{12}$
$3+12\cdot19-10$
$-6x^2-3x+5=0$
$5\sin\left(2x\right)=2$
$\frac{1}{x}+\frac{1}{x-6}=\frac{x-5}{x-6}$
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