is much easier to understand than (sqr root of (9 +sqr root of 80)+sqr root of (9 - sqr root 80))^2.

So, in order to help you with the questions you post more efficiently please use the following guide to write math formulas.

Fractions

How to make (x+3)/(x+5)>0 to look like

\frac{x+3}{x+5}>0:

Step 1: Highlight the fraction (x+3)/(x+5);

Step 2: Press

fraction button;

Step 3: Now, highlight the whole expression and press

m button.

Square roots

How to make (x+5)^(1/2)<17^(1/2) to look like

\sqrt{x+5}<\sqrt{17}:

Step 1: Highlight x+5 and press

square_root button, then highlight 17 and press

square_root button again;

Step 2: Now, highlight the whole expression and press

m button.

Other Useful Symbols

Another Way of Writing Fractions:How to make (a+b)/c to look like

\frac{a+b}{c}Step 1: Write \frac{a+b}{c}, (note that numerator and denominator must be enclosed in

{ } and you must write out

\frac to tell the system that it is a fraction);

Step 2. Highlight the whole expression and press

m button.

ExponentsHow to make x^12 to look like

x^{12}Step 1: Write

x^{12}, (note that multi-digit powers must be enclosed in

{ });

Step 2. Highlight the whole expression and press

m button.

RootsHow to make 3rd root of x^2 to look like

\sqrt[3]{x^2}Step 1: Write

\sqrt[3]{x^2}, (note that 3 must be enclosed in

[ ] and 2 must be enclosed in

{ });

Step 2. Highlight the whole expression and press

m button.

Inequalitiesx\approx{3}: write x\approx{3} and press

m button (note that 3 must be enclosed in

{ }).

x\leq5: write x\leq{5} and press

m button.

x\geq3: write x\geq{3} and press

m button.

x\neq0: write x\neq{0} and press

m button.

Subscriptx_1: write x_1 and press

m button. If a subscript is more than one-digit number, for example

x_{15} then write x_{15} and press

m button (note that such kind of subscripts must be enclosed in

{ }).

Geometry\pi: write \pi and press

m button;

\angle: write \angle and press

m button;

90^{\circ}: write 90^{\circ} and press

m button;

\alpha: write \alpha and press

m button;

\triangle: write \triangle and press

m button.