$\left(\frac{1}{x}+8y^2x\right)dx+\left(8yx^2-sec^2y\right)dy=0$
$\lim_{n\to\infty}\:1^n$
$+\left(4x-3x^3+2y^2-1\right)\cdot\left(4x+2x^2+3\right)$
$\left(5\cdot10^8\right)^{10}$
$z^2-16z$
$y^2\:+\:7y\:=\:7$
$2x^5\:-\:54x^2$
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