$\left(2x-1\right)\left(2x+1\right)$
$28y^2-27y-10$
$\int_{-2}^2\left(x+2\right)kdx$
$\left(5m-9\right)^2$
$35m^3-40m^5$
$8^4\cdot8^{-2}$
$\sin\left(4x\right)=\sin\left(2x\right)$
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