$\lim_{x\to\frac{\pi}{4}}\left(\frac{\tan\left(3x\right)}{\sin\left(2x\right)+\sec\left(^2x\right)}\right)$
$a^2+6^2$
$\ln\sqrt{\frac{2x+1}{2x-1}}$
$1414\cdot3$
$2x^4+\frac{3}{x^2}+\frac{3}{x^4}$
$ab+4b-3a;\:a=7;\:b=6$
$-4.87=\log\left(x\right)$
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