$5\cos^23x-4=-2$
$7x^2y-5x^2y+2x^2y-x^2y$
$\int_3^4\frac{\left(5t^3-4t\right)}{t^4-16}\:\:dt$
$\frac{dy}{dx}=\frac{5\left(y^2+3y+2\right)}{x\left(5y+7\right)}$
$\left(2h^3.4h\right)^2$
$\left(2\right)\left(2+4\right)$
$\left(2x-y-3\right)^2$
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