$\frac{1}{\sin\left(x\right)}-\frac{\cos^2\left(x\right)}{\sin^2\left(x\right)}=1$
$-\left(+5-9-\left(-1-6-9\right)-2+3\right)-7$
$\frac{dy}{dx}=e^{2x}+y-1$
$1^2-4\cdot4+3$
$\int\frac{x^3}{\sqrt{169-x^2}}dx$
$-98+-33$
$4y^2\:=0$
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