$\left(x^3-\frac{5}{7}y^2\right)^2$
$l\left\{\frac{e^{2t}sent}{3t}\right\}$
$-25\:+\left(-4\right)+\left(32\right)+120$
$5\cdot2^x+2^x=24$
$\lim_{x\to0}\left(\frac{1-\cos\left(x\right)}{x^2-5}\right)$
$\left(4b+8\right)\left(4b-8\right)$
$6z^2+5z-1$
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