$\left(r\:^3\:-\:2m^3\right)^2$
$x y ^ { 2 } = 9$
$x^2-3x\:\:-3$
$7^2\cdot7^5\cdot2^2$
$x^2+16x=-28$
$\lim_{x\to0}\ln\left(\frac{2x+3}{2x}\right)^{2x}$
$\lim_{x\to-2}\left(\frac{x+2}{x^2-3x+1}\right)$
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