$\frac{x}{3}-5=0$
$3y^2\:-6+x-6y^2-2-4y^2-6x$
$\lim_{x\to1}\left(\frac{\left(1-k\right)^x\left(j\right)^{1-x}-1}{1-x}\right)$
$-21x+68+x^2$
$\left(\sec\left(c\right)-1\right)\cdot\left(\sec\left(c\right)+1\right)=\tan^2\left(c\right)$
$\left(2x^4-3\right)^2$
$4\left(x+3\right)+\left(5-x\right)$
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