Complete answer changed again:

Candice's land (in m2) is equal to the total area of Albert's land and Betty's land (in m2).

>! 1) $c^2=a^2+b^2$ pythagoras' theorem.

On March 14th, the frequency of the radiation waves is exponentially higher.

>! 2) Volume of a cylinder $V=(πr^2)h$

The price of a litre of water and cement squared is equal to ice, brick and two watery cement(s).

>! 3) $(a+b)^2=a^2+b^2+2ab$

A number of power of a smaller number is derived from a power of number.

>! 4) if $y=kx^n$ then $dy/dx=nkx^n-1$

Signs over a reason is always temporary.

>! 5) $tan(theta)=sin(theta)/cos(theta)$