$\left(5y^2r^4\right)^4$
$\left(x+4\right)\left(x+3\right)+\left(x+6\right)\left(x+1\right)-2\left(x^2+7x+5\right)$
$k^2\:13k\:+\:40$
$\lim_{x\to-5}\left(\frac{x^3+5x^2}{x^2+10x+25}\right)$
$-4+6+-14+7+-42+4$
$4x\:+\:9x\:+\:7x$
$x^{4}+10x^{2}+25$
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