$\left(-11-10i\right)^2$
$\int3x\cdot\cos\left(3x\right)$
$9^3.9^3$
$1-sec^2x\:cot^2x\:=-cot^2x$
$\left(y-2r\right)^3$
$\frac{8y^3-2y+5}{y^2-y}$
$2\:x\:-3^2\:-\:21$
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