$( 7 c ^ { 2 } + \sqrt { 3 } ) ^ { 2 }$
$\frac{x^3-9x^2\:+27x\:-27\:\:}{x-3}$
$\lim_{x\to0}\left(\frac{e^x-e^{-x}}{\cos\left(x\right).\sin\left(x\right)}\right)$
$x^2+18x-4=0$
$\lim_{x\to0+\:}-\left(sen\left(x\right)^x\right)$
$x^4+12x^3-64x^2$
$\left(-3y^7+5\right)^2$
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