$x^2+17x+42=0$
$\frac{1}{3\left(3j+6\right)}$
$\int-tan\left(\frac{x}{2}\right)dx$
$x^2+10x=11$
$6x^5-7x^9$
$\frac{x^4}{4x^3}$
$x^2-1-2^3$
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