$\cot x\left(\sec^2x-1\right)$
$\left(7q+8\right)\left(4q-5\right)=0$
$\left(4^3\right)^{-5}$
$-\frac{240}{8}$
$12\:a\:2\:+\:8\:a\:+\:5\:a\:2\:-\:7a\:-\:5\:a\:2\:+\:9\:a\:+\:7\:a\:2\:-\:5a$
$\int\frac{5x^3-4x^{\frac{5}{2}}+2x^{-\frac{3}{2}}-7x}{x^2}dx$
$7x-4\sqrt{\left(x^2+1\right)}\frac{dy}{dx}=0$
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