$\left(2x+2y\right)\left(9x^2-6xy+4y^2\right)$
$\left(3+a+b\right)^2$
$1+\left(-10\right)-\left(-6\right)$
$-.-1+4\cdot2+3\cdot2$
$\frac{a^{-2}}{a^{-6}}$
$d^2=196$
$-24\:\cdot\:-7\:+\:67\:\cdot\:0$
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