$$\sum_{i=1}^{n}{5(-1)^n(n-5)}$$
$$\sum_{i}^{n}{(5+3i)=n.(3n+13)/2}$$
x+30x/100=15700
5 (2.5x +9)= -17.5 -6.5x
10(1+0.8) Raised to the power of 168
(5y+1)(3y-1)= y+1
what is 24/40 into simplified fractions
what is 24 x 40 into simplified fractions?
2^4-3(2)^3+2=2
3015.928=125(2.5)(b-4)
