$\left(7ab2\:-\:5b\right)^3$
$x4y-2xy+3xy$
$2\left(\frac{d^2y}{dx^2}\right)+\frac{dy}{dx}-y=0$
$2cos^2x=1-cosx$
$\frac{2x^2+5.8}{6\cdot4x+2}$
$\left(x^3.y^4\right)\left(x^5y\right)$
$\left(-6\right)\left(-24\right)-18$
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