$\left(a^2\:-\:\frac{b^2}{2}\right)^2$
$\left(1-cos2x\right)csc2x=1$
$a+9+10a$
$\left(6x+10\right)+\left(4x+30\right)$
$\left(-3y^7+5\right)^2$
$\left(16^3\right).2^{-3}$
$\lim x\to0^+\left(1+\frac{1}{x}\right)^x$
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