$-5\left(-7-4\right)$
$\lim_{x\to\infty}\left(\frac{1-e^x}{x}\right)$
$\left(9a^2+2b\right)^2$
$\left(4v+4\right)^3$
$1-a+8+-a+6$
$\left(x+k\right)^5$
$2x^2+3xy-4x$
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