$\frac{x^3-x^2+2x+6}{x-3}$
$cosh\left(2x\right)=cosh^{\left(2\right)}x+senh^{\left(2\right)}x$
$6n^2-96$
$7^0+15^1-12^0-9^1$
$cscx\left(1-cos2x\right)$
$2x^2-8x=10$
$y''+7y'+12y=0$
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