$-\frac{8}{\left(sec\left(x\right)+1\right)\left(sec\left(x\right)-1\right)}$
$\sqrt[3]{-125a^9y^6}$
$\left(7a^3b^5+8c^2d^4\right)\left(7a^3b^5-8c^2d^4\right)$
$3.24x^2-0.81$
$\sin^2x-2\sin x=0$
$\int_0^1\left(1-\sqrt{x}\right)^2dx$
$169m^2\:+\:n^2\:-\:26mn$
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