help me

[coarse trout]

i need process

[ripe barn]

$V=4\int^{t}_{0} e^{-t} \mathrm{dt}-4$ \ \ =4[-e^{-t}]^t_0 -4 \ \ =-4e^{-t}+4-4$ \ \ $-4e^{-t}$

[spice tiger]

enclave wangedrocht
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