$2^6+6^2+2\left(-6\right)$
$\sqrt[8]{5^4}$
$\frac{\sin\left(x\right)}{\sec\left(x\right)\csc\left(x\right)}$
$7+10.\:5+10$
$\left(xa-xb\right)\left(xa-xb\right)$
$x^4+6x^2+90$
$a^2+\frac{2}{8}a+\frac{1}{6}$
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