$\frac{3\left(5x^2-7\right)}{4}$
$-2x\left(x+1\right)=-6$
$\left(\frac{3x^2-1}{2x-1}\right)^3$
$\left(-3m^2n\right)\left(-5mn^3\right)$
$\left(-1\right)^2+\left(-1\right)^3-1^4+1^5$
$\left(a^3b^4+\:a^2\:c\:\right)^2$
$\lim_{x\to\frac{3\pi}{2}}\left(\frac{1+2sin\left(x\right)\left(cosx\right)}{\left(1+sinx\right)\left(1-2sinx\right)}\right)$
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