$5\left(x+y\right)^2$
$\int\left(\frac{x}{y}\right)dy$
$13\cos\left(x+67.4\right)=5$
$\sin2\left(x\right)-\sin^2\left(x\right)=0$
$2\left(x-6\right)\left(2x+8\right)$
$4x+4+-9x+12y-10y$
$a^4-4b^4$
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