$\left(5y-x\right)^3$
$14+200$
$2x+3y+4y-x$
$a+b+c+c+x+a+a+b+y+c+b+a+a+b+c+z+2c+b+b+z+c+c+y+a+x$
$\lim_{x\to4}\left(\frac{x^4-1}{x^2-1}\right)$
$4c^3+4c^3$
$9-3-16-15+12-11$
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