$\left[\left(a+b\right)+\left(x+y\right)\right]\left[\left(a+b\right)-\left(x-y\right)\right]$
$9a^{4}b^{4}-25p^{4}a^{4}$
$6t\:\left(2t^2\:+\:5t\:+\:8\right)$
$\int cos\:\left(x+2\right)dx$
$5x-2<16-4x$
$\frac{12k^3}{3k^3}$
$8x+5<9$
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