$\sqrt[2]{\frac{2\cdot20}{9.8}}$
$sec\theta\:csc\theta\:=tan\theta\:+cot\theta\:$
$78.00\cdot3.6$
$e^t\left(y\:+\:z\right)\:=\:\left(y\:+\:z\right)e^t$
$\left(-6x^4\right)\left(-3x^3\right)$
$\sin20\cos10+\sin10\cos20$
$81y^2-64z^2$
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