$\sqrt{x}+\:15\:=\:7$
$17+\left(-5\right)-\frac{4}{5}j-\frac{2}{5}j+7$
$\frac{\left(n+1\right)\cdot\:\left(-3\right)^n}{\left(2n+1\right)\cdot2^n}$
$8-2x-4$
$\int\left(\frac{10x^2-5}{x}\right)dx$
$-x^2+6x-6$
$\frac{3x^3+2x^2-7+2}{x+2}$
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