$\log x^2+\log2=\log8$
$\left(-5\right)\left(-4\right)\left(-11\right)\left(-3\right)$
$\left(30cm\right)^2-\left(5cm\right)^2$
$27x+45y$
$334+\left(-543\right)$
$8tan\left(x\right)+11=19$
$y'\:-\:y\:=\:2e^2$
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