$\frac{-cscx}{secx}+\frac{cosx}{-sinx}$
$x+9=7$
$2x^4-3x^3+2x^2-2x^2+3x-2$
$\frac{115.45}{57.7}$
$\left(+24\right)-\left(-32\right)$
$x^2+b\:x\:x+36$
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