$\sin\left(x+30\right)=0.5$
$cos\:=-\frac{4}{5}$
$\left(-3a+3\right)^2$
$\int_e^2dx$
$x^3\frac{dy}{dx}-3x^2y=2x^3y^2$
$\left(24+14\right)-\left(-55\right)$
$2\:cos\:x\:=\:0.2$
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