7-2x=-3
4y+1=15 what is y
1/sin2A + cos4A/sin4A=cotA-cosecA
if a is 150% of b , b is 40% of c. if a+b+c=20, then the value of 2b+3c-4a=?
Express $2.147\bar{8}$ (bar only on 8) in the form of $\frac{p}{q}$.
$$\int_{-2}^{-2}5x^2dx$$
$$\sum_{n=2}^{11}{n^3}$$
if f(t) = 3t+9t to the power fourth find:
f1(t)
Simplify (12a^2b/18ab^2):
11
$$\sum_{a}^{b}{C}$$ n^3
n^2
