4× $5^{4,5}$
5x+y=-5
5x-3y=11
20+5*8÷(12-8÷4)
11.98 x 0.2261
–16j + 3 + 20j = 4j − 11
c.i=0-5,5-10,10-15 4,15-20,20-25,25-30,30-35,35-40 F=2,5,7,13,21,16,8,3
3^(2(x-1))-8(3^(x-2))-1=0
x=x/2 +4 $\sqrt{\ x}$ +6+3+1
xy-xz=10000
