$\left(2x^3-5x^2-4x\right)-\left(x^2+5x-2\right)$
$65+64-6+87$
$\sec w\sin w$
$4\left(2x-5\right)+15=3\left(x+10\right)$
$\int\frac{-3x^3}{\sqrt{x^2+9}}dx$
$x^4-9x^2+4x+12$
$-11\:=\:-\:6\:-3\:\left(2c+4\right)\:-c$
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