$480+240$
$f\left(x\right)\:=-x^2\:-\:x\:+6\:$
$\left(28\::\:7\:+1\:-4\right)x\:10\:+\left(5\:x\:8-40\::2\right)-15\:$
$\frac{sinx}{\left(secx+1\right)\left(1-cosx\right)}$
$y'\:=\:xy\:+\:2x$
$\left(-1\right)+11+5$
$\int\frac{1}{\left(4+3x\right)^9}dx$
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