$\left(2\sqrt{x}+3\sqrt{y}\right)^2$
$a^2+ab^2$
$\frac{1+\cot\left(0\right)}{1+\tan\left(0\right)}$
$\left(-4\right).\left(10-12\right)+\left(15-4-1\right):\left(-5\right)$
$1<2\left(-2\right)-4\le7$
$y2\:+\:7y\:+\:10$
$49j^2-140j+100$
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