$4\cos x-2=0$
$64\frac{1}{4}$
$x+2x+5x-4y+7y-5y$
$\left(2x^5y^2\right)^3\left(2xy\right)^2$
$\left(3z^2\cdot2z\right)^3$
$\int_0^2\left(\frac{10}{\sqrt{4-x^2}}\right)dx$
$5z+3-3z$
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