$\int\:t^3\sqrt{2-t^2}dt$
$\frac{dy}{dx}+y=\frac{1}{1+e^{2x}}$
$6.2\:x\:3.4$
$x^2-6x=-7$
$f\left(x\right)=\left(x^{-2}+x^{-3}\right)\left(x^5-7x^2\right)$
$8-9-35+9$
$\left(a+b\sqrt{-1}\right)^4$
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