$\left(-12\right)+\left(+9\right)-\left(-11\right)-\left(-6\right)$
$10\cdot1000$
$3x^3y^2+3y^2$
$\left(r^2+2\right)^2$
$3\log c-y\log d$
$5x\left(v+6\right)$
$98,321\cdot120,332$
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