4-5+9
x³-3x+1=0
11x-2y=-36
20x-47y=-90
solve for x and y
Without using tables or calculators,show that tan 15=2- $\sqrt{\Box}$ 3
|n-7|+8=17
1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000...
12*12*12*12*12*12*12*12*12*12*12*12*12*12*12*12
x+y=1.287262935597079127914529663121
IF 10 MEN SORT 1500 LETTERS HOW MANY MENS WOULD BE REQUIRED 3150 LETTERS
2x^2 -14x +3=f(x^2 -7x-1)
find f(x)
