$3cos^2x+2sinx-2=0$
$\frac{\cos\left(y\right)-\left(x+2\right)\cos\left(y\right)}{x\cos\left(y\right)}$
$\sqrt{117}$
$81x^2-3x+36$
$76 - 5 - 10 + - 3$
$\left(x+1\right)^3\:-\:3x^2\:-\:\frac{1\left(x+1\right)}{\left(x+2\right)}$
$\frac{5}{r+1}+\frac{4}{3r-3}$
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